\ProvidesFile{headfoot.tex}[2002/11/07 KOMA-Script manual, english]
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% Copyright (c) 2001 Markus Kohm and the authors.
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% headfoot.tex
% Copyright (c) 2001 Markus Kohm und bei den weiteren Autoren.
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%
% module:   scrpage2
% authors:  Jens-Uwe Morawski <morawsi@gmx.net>
%           Markus Kohm <Markus.Kohm@gmx.de>
% translation:
%           Jens-Uwe Morawski <morawsi@gmx.net>
% content:  head and foot lines with scrpage2
% language: english
% comments encoding:
%           US-ASCII
% date of translated german file: 2002/11/07
%
%
\chapter{Adapt Head and Foot with \Package{scrpage2}}\label{cha:scrpage}
%
\BeginIndex{Package}{scrpage2}%
%
In \autoref{cha:typearea} this guide referenced a package
to customise the head and foot lines of a document.
This package \Package{scrpage2}, the successor of \Package{scrpage},
enables the user to create versatile head and foot layouts with
less effort, due to a simple but powerful user interface.

\BeginIndex{Package}{scrpage}%
%
The package's focus is its good integration into the whole
\KOMAScript{}-bundle, thus it extents the base functionality
of \KOMAScript{} perfectly.
It is very flexible in either its layout and usage, compared to 
other packages often to be seen 
like \Package{fancyhdr}\cite{package:fancyhdr}.

Neither \Package{scrpage2} nor \Package{scrpage} must be used
with \KOMAScript{}, the package can be used in any
other document-class environment.
New documents shall base upon the package \Package{scrpage2},
but the package \Package{scrpage} is always distributed
for compatibility reasons.
The current chapter points to \Package{scrpage2} only.
Commands available in both versions are signed \ScrpageMark{}(see margin),
if the commands of the new version differ from the former one an advice
can be found in marked paragraphs\ScrpageNote{}.
%
\EndIndex{Package}{scrpage}


\begin{Explain}% Introduction to headings
  \LaTeX{}s head and foot mechanism is a little complicated, thus a
  brief view in its depth is needed.
  Basically the \LaTeX{}-kernel defines the chief page styles
  \PValue{empty} and \PValue{plain}.
  The latter writes only a page number in the foot, in contrast
  using \PValue{empty} results in blank head and foot.
  Besides, many document classes provide the style
  \PValue{headings}, which allows more complex style settings.
  The \PValue{headings} style often has a subvariant, the
  \emph{my}-variant. In contrast to the \PValue{headings} style
  the \PValue{myheadings} switches off the automatic update
  of the running head, thus it is the users task keeping headings
  in sync with the current document content.
  A more detailed discription can be found in section
  \ref{sec:maincls.pageStyle}.
  
  Another important note is that some \LaTeX{}-commands
  switch to the pagestyle \PValue{plain} for the current page,
  independent from what pagestyle was choosen by the author,
  consequently the document needs an appropriate 
  \PValue{plain} pagestyle.
  
  Therefore \Package{scrpage2} defines its own \PValue{plain}
  and \PValue{headings} page styles, named \PValue{scrplain}
  and \PValue{scrheadings}.
  The manual activation of \PValue{scrplain} is not necessary,
  since the activation of \PValue{scrheadings} takes care of it
  automatically.
  Only if one wants to use his own page style in combination
  with \PValue{scrplain}, the page style \PValue{scrplain} has to
  be activated first, i.e. \Macro{pagestyle}\Parameter{scrplain}%
  \Macro{pagestyle}\Parameter{personalPagestyle}.
  
  % the following is not required, but included here since first
  % page is stretched
  The original \PValue{headings} page style of the document class
  is available as \PValue{useheadings}. This re-definition is
  required since \Package{scrpage2} uses another way to deal with
  automatic and manual headings. This way is more flexible and
  allows configurations usually difficult to implement for
  unexperienced users. The required commands to work with the
  \Package{scrpage2} implementation are introduced at the end
  of \ref{sec:scrpage.basics.buildIn} and
  the begin of \ref{sec:scrpage.basics.mark}.
\end{Explain}

\section{Basic Functionality}\label{sec:scrpage.basics}
\subsection{Predefined Page Styles}\label{sec:scrpage.basics.buildIn}
% \lehead ...
% scrheadings
% \headmark \pagemark 

\begin{Declaration}
  \PValue{scrheadings}\\
  \PValue{scrplain}
\end{Declaration}%
\BeginIndex{Pagestyle}{scrheadings}\BeginIndex{Pagestyle}{scrplain}%
\Index{page style}%
%
Package \Package{scrpage2} delivers an own pagestyle, named
\PValue{scrheadings}.
The command \Macro{pagestyle}\PParameter{scrheadings} activates
this page style, likewise
after activation an appropriate \PValue{plain} pagestyle
is available.
In this case \emph{appropriate} meens that the \PValue{plain}
page style is also configureable by the commands introduced in
\autoref{sec:scrpage.basics.format}, which, for example,
configure the head and foot width.
Neither the activation of \PValue{scrheadings} nor \PValue{scrplain}
influences the mode of manual or automatic headings,
see \autoref{sec:scrpage.basics.mark}.

\begin{Declaration}
  \Macro{lehead}%
    \OParameter{scrplain-left-even}\Parameter{scrheadings-left-even}\\
  \Macro{cehead}%
    \OParameter{scrplain-concentric-even}\Parameter{scrheadings-concentric-even}\\
  \Macro{rehead}%
    \OParameter{scrplain-right-even}\Parameter{scrheadings-right-even}\\
  \Macro{lefoot}%
    \OParameter{scrplain-left-even}\Parameter{scrheadings-left-even}\\
  \Macro{cefoot}%
    \OParameter{scrplain-concentric-even}\Parameter{scrheadings-concentric-even}\\
  \Macro{refoot}%
    \OParameter{scrplain-right-even}\Parameter{scrheadings-right-even}\\
  \Macro{lohead}%
    \OParameter{scrplain-left-odd}\Parameter{scrheadings-left-odd}\\
  \Macro{cohead}%
    \OParameter{scrplain-concentric-odd}\Parameter{scrheadings-concentric-odd}\\
  \Macro{rohead}%
    \OParameter{scrplain-right-odd}\Parameter{scrheadings-right-odd}\\
  \Macro{lofoot}%
    \OParameter{scrplain-left-odd}\Parameter{scrheadings-left-odd}\\
  \Macro{cofoot}%
    \OParameter{scrplain-concentric-odd}\Parameter{scrheadings-concentric-odd}\\
  \Macro{rofoot}%
    \OParameter{scrplain-right-odd}\Parameter{scrheadings-right-odd}\\
  \Macro{ihead}%
    \OParameter{scrplain-inside}\Parameter{scrheadings-inside}\\
  \Macro{chead}%
    \OParameter{scrplain-concentric}\Parameter{scrheadings-concentric}\\
  \Macro{ohead}%
    \OParameter{scrplain-outside}\Parameter{scrheadings-outside}\\
  \Macro{ifoot}%
    \OParameter{scrplain-inside}\Parameter{scrheadings-inside}\\
  \Macro{cfoot}%
    \OParameter{scrplain-concentric}\Parameter{scrheadings-concentric}\\
  \Macro{ofoot}%
    \OParameter{scrplain-outside}\Parameter{scrheadings-outside}
\end{Declaration}%
\BeginIndex{Cmd}{lehead}\BeginIndex{Cmd}{cehead}\BeginIndex{Cmd}{rehead}%
\BeginIndex{Cmd}{ihead}\BeginIndex{Cmd}{chead}\BeginIndex{Cmd}{ohead}%
\BeginIndex{Cmd}{lohead}\BeginIndex{Cmd}{cohead}\BeginIndex{Cmd}{rohead}%
\BeginIndex{Cmd}{lefoot}\BeginIndex{Cmd}{cefoot}\BeginIndex{Cmd}{refoot}%
\BeginIndex{Cmd}{ifoot}\BeginIndex{Cmd}{cfoot}\BeginIndex{Cmd}{rfoot}%
\BeginIndex{Cmd}{lofoot}\BeginIndex{Cmd}{cofoot}\BeginIndex{Cmd}{rofoot}%
%
The page styles include three boxes either in head and foot.
The commands modifying the content of these boxes can be seen
in \autoref{fig:scrpage.leheadetall}.
Commands in the middle column modify the boxes content on both the odd
and even pages.

\begin{figure}
  \centering
  \setlength{\unitlength}{1mm}\begin{picture}(100,65)(0,10)\small
    \put(0,12){\dashbox{2}(40,56){even page}}
    \put(60,12){\dashbox{2}(40,56){odd page}}
                                % items top left
    \put(1,63){\framebox(8,4){~}}
    \put(16,63){\framebox(8,4){~}}
    \put(31,63){\framebox(8,4){~}}
                                % items top right
    \put(61,63){\framebox(8,4){~}}
    \put(76,63){\framebox(8,4){~}}
    \put(91,63){\framebox(8,4){~}}
                                % items bottom left
    \put(1,13){\framebox(8,4){~}}
    \put(16,13){\framebox(8,4){~}}
    \put(31,13){\framebox(8,4){~}}
                                % items bottom right
    \put(61,13){\framebox(8,4){~}}
    \put(76,13){\framebox(8,4){~}}
    \put(91,13){\framebox(8,4){~}}
                                % commands and arrow
                                % for twoside
                                % 
    \put(50,65){\makebox(0,0){\Macro{ihead}}}
    \put(44,65){\vector(-1,0){4}}\put(56,65){\vector(1,0){4}}
    \put(50,58){\makebox(0,0){\Macro{chead}}}
    \put(44,58){\line(-1,0){24}}\put(56,58){\line(1,0){24}}
    \put(20,58){\vector(0,1){4}}\put(80,58){\vector(0,1){4}}
    \put(50,51){\makebox(0,0){\Macro{ohead}}}
    \put(44,51){\line(-1,0){40}}\put(56,51){\line(1,0){40}}
    \put(4,51){\vector(0,1){11}}\put(96,51){\vector(0,1){11}}
                                %
    \put(50,15){\makebox(0,0){\Macro{ifoot}}}
    \put(56,15){\vector(1,0){4}}\put(44,15){\vector(-1,0){4}}
    \put(50,22){\makebox(0,0){\Macro{cfoot}}}
    \put(44,22){\line(-1,0){24}}\put(56,22){\line(1,0){24}}
    \put(20,22){\vector(0,-1){4}}\put(80,22){\vector(0,-1){4}}
    \put(50,29){\makebox(0,0){\Macro{ofoot}}}
    \put(44,29){\line(-1,0){40}}\put(56,29){\line(1,0){40}}
    \put(4,29){\vector(0,-1){11}}\put(96,29){\vector(0,-1){11}}
                                % commands for oneside
    \put(5,69){\makebox(0,0)[b]{\Macro{lehead}}}
    \put(20,69){\makebox(0,0)[b]{\Macro{cehead}}}
    \put(35,69){\makebox(0,0)[b]{\Macro{rehead}}}
                                %
    \put(65,69){\makebox(0,0)[b]{\Macro{lohead}}}
    \put(80,69){\makebox(0,0)[b]{\Macro{cohead}}}
    \put(95,69){\makebox(0,0)[b]{\Macro{rohead}}}
                                %
    \put(5,11){\makebox(0,0)[t]{\Macro{lefoot}}}
    \put(20,11){\makebox(0,0)[t]{\Macro{cefoot}}}
    \put(35,11){\makebox(0,0)[t]{\Macro{refoot}}}
                                %
    \put(65,11){\makebox(0,0)[t]{\Macro{lofoot}}}
    \put(80,11){\makebox(0,0)[t]{\Macro{cofoot}}}
    \put(95,11){\makebox(0,0)[t]{\Macro{rofoot}}}
  \end{picture}
  \caption[Commands for modification of
    \Package{scrpage2}-pagestyles elements]%
    {Commands for modification of pagestyles \PValue{scrheadings} and
      \PValue{scrplain} and their association to head and foot elements}
  \label{fig:scrpage.leheadetall}
\end{figure}

\begin{Example}
If one wants the page number be placed in the middle of the
foot, then following can be used:
\begin{small}
\begin{verbatim}
  \cfoot{\pagemark}
\end{verbatim}
\end{small}
The next example shows how to place both running head and
page number in the head; the running head inside and the page number
outside.
\begin{small}
\begin{verbatim}
  \ohead{\pagemark}
  \ihead{\headmark}
  \cfoot{}
\end{verbatim}
\end{small}
The command \Macro{cfoot}\PParameter{} is only required in order
to empty the item in middle of the foot,
which normally contains the page number.
\end{Example}

Using the commands which are associated with only one item
allows more advanced settings.

\begin{Example}
Assuming one has the order to write an annual report for his
company, he could use commands like this:
\begin{small}
\begin{verbatim}
  \ohead{\pagemark}
  \rehead{Annual Report 2001}
  \lohead{\headmark}
  \cefoot{TheCompanyName Inc.}
  \cofoot{Department: Development}
\end{verbatim}
\end{small}
In order to keep in sync the data in the foot with the content
of the document, the foot has to be updated using \Macro{cofoot}
when a new department is discussed in the report.
\end{Example}

As mentioned above, there is an \PValue{plain}-pagestyle which corresponds
to \PValue{scrheadings}. Since it should also be possible to adapt this style, the
commands support an optional argument. Thus the contents of the appropriate
field of the \PValue{plain}-pagestyle can be modified.

\begin{Example}
The position of the page number for the pagestyle \PValue{scrheadings}
can be declared as follows:
\begin{small}
\begin{verbatim}
  \cfoot[\pagemark]{}
  \ohead[]{\pagemark}
\end{verbatim}
\end{small}
When now the command \Macro{chapter}, after it has started a new page,
switches to the \PValue{plain}-pagestyle, then the page number
is centered in the foot.
\end{Example}
%
\EndIndex{Pagestyle}{scrheadings}\EndIndex{Pagestyle}{scrplain}%

\begin{Declaration}
  \Macro{clearscrheadings}\\
  \Macro{clearscrplain}\\
  \Macro{clearscrheadfoot}
\end{Declaration}%
\BeginIndex{Cmd}{clearscrheadings}%
\BeginIndex{Cmd}{clearscrplain}%
\BeginIndex{Cmd}{clearscrheadfoot}%

If one wants to redefine both the page style \PValue{scrheadings}
and the \PValue{plain} page style, frequently one must delete 
some already occupied page items. Since one fills all items
rarely with new contents, in most cases several
instruction with empty parameters are necessary.
With the help of these three instructions the deletion is fast and
thoroughly possible.
While \Macro{clearscrheadings} only deletes all fields of the 
page style \PValue{scrheadings} and \Macro{clearscrplain} deletes
all fields of the appropriate \PValue{plain} page style,
\Macro{clearscrheadfoot} sets all fields of both page styles on
empty contents.

\begin{Example}
If one wants to reset the page style to the default \KOMAScript{} settings,
independent from the actual configuration, only these three commands are
sufficient.
\begin{small}
\begin{verbatim}
  \clearscrheadfoot
  \ohead{\headmark}
  \ofoot[\pagemark]{\pagemark}
\end{verbatim}
\end{small}
Without the commands \Macro{clearscrheadfoot},
\Macro{clearscrheadings} and \Macro{clearscrplain}
6 commands with 9 empty arguments are required.

  \begin{small}
\begin{verbatim}
  \ihead[]{}
  \chead[]{}
  \ohead[]{\headmark}
  \ifoot[]{}
  \cfoot[]{}
  \ofoot[\pagemark]{\pagemark}
\end{verbatim}
  \end{small}
  Of course, assuming a special configuration some of them can
  be dropped.
\end{Example}
%
\EndIndex{Cmd}{clearscrheadings}%
\EndIndex{Cmd}{clearscrplain}%
\EndIndex{Cmd}{clearscrheadfoot}%
%
\EndIndex{Cmd}{lehead}\EndIndex{Cmd}{cehead}\EndIndex{Cmd}{rehead}%
\EndIndex{Cmd}{ihead}\EndIndex{Cmd}{chead}\EndIndex{Cmd}{ohead}%
\EndIndex{Cmd}{lohead}\EndIndex{Cmd}{cohead}\EndIndex{Cmd}{rohead}%
\EndIndex{Cmd}{lefoot}\EndIndex{Cmd}{cefoot}\EndIndex{Cmd}{refoot}%
\EndIndex{Cmd}{ifoot}\EndIndex{Cmd}{cfoot}\EndIndex{Cmd}{rfoot}%
\EndIndex{Cmd}{lofoot}\EndIndex{Cmd}{cofoot}\EndIndex{Cmd}{rofoot}%

\begin{Declaration}
  \Macro{leftmark}\\
  \Macro{rightmark}
\end{Declaration}%
\BeginIndex{Cmd}{leftmark}\BeginIndex{Cmd}{rightmark}%
These two instructions make it possible to access the running headlines,
which are normally meant for the left or for the right page. These two
instruction are not made available by scrpage or scrpage2, but directly
by the \LaTeX{} kernel. If in this section running headline of the
left side or the right page are mentioned,
then the contents of \Macro{leftmark} or \Macro{rightmark}
is meant.
%
\EndIndex{Cmd}{leftmark}\EndIndex{Cmd}{rightmark}%

\medskip
In previous examples two commands already have been used, which 
haven't been introduced yet. Now, the description of these
commands shall follow.

\BeginIndex{Cmd}{headmark}
\begin{Declaration}
\Macro{headmark}
\end{Declaration}%
\ScrpageMark{}%
This command gives access to the content of running heads.
In contrast to \Macro{leftmark} and \Macro{rightmark}, one
need not regard the proper assignment to left or right page.
\EndIndex{Cmd}{headmark}

\BeginIndex{Cmd}{pagemark}
\begin{Declaration}
\Macro{pagemark}
\end{Declaration}%
\ScrpageMark{}%
This command returns the formatted page number. The formatting
can be controlled by \Macro{pnumfont} introduced in
\autoref{sec:scrpage.basics.format} or by \Macro{setkomafont}
if a newer version \KOMAScript{} is used, see \ref{sec:maincls.font}.
% the last describtion \setkomafont ... is only fill-text
\EndIndex{Cmd}{pagemark}

\BeginIndex{Cmd}{pagestyle}\BeginIndex{Pagestyle}{useheadings}
\begin{Declaration}
\Option{useheadings}
\end{Declaration}%
The package \Package{scrpage2} is meant primarily for the fact that the supplied
styles are used or own styles are defined. However it can be necessary
to shift back also to the style provided by the document class.
It would be obvious to do this with \Macro{pagestyle}\PParameter{headings},
but this has however the disadvantage that commands
\Macro{automark} and \Macro{manualmark} discussed in the following
do not function as expected.
For this reason one should shift back to the original styles using
\Macro{pagestyle}\PParameter{useheadings}.
Such a switching has then no effect on it whether one
operates with manual or automatic running headlines.
%
\EndIndex{Cmd}{pagestyle}\EndIndex{Pagestyle}{useheadings}

\subsection{Manual and Automatic Headings}
\label{sec:scrpage.basics.mark}
% \automark \manualmark 
%
Normally there is a \emph{my}-version of the \PValue{headings}-style.
If such a style is active, then the running headlines are
updated no longer automatically.
With \Package{scrpage2} another path is taken. Whether the running
headlines are living or not, determines the instructions \Macro{automark}
and \Macro{manualmark}.
The default can be also already influenced while the loading of the
package with the options \Option{automark} and \Option{manualmark},
see \autoref{sec:scrpage.basics.options}
on \autopageref{page:scrpage.automark}.

\BeginIndex{Cmd}{manualmark}
\begin{Declaration}
\Macro{manualmark}
\end{Declaration}%
As the name already clarifies, \Macro{manualmark} switches off the updating
of the running headlines. It is left to the user to provide for
updating or for contents of the running headlines.
For that purpose the instructions \Macro{markboth}\IndexCmd{markboth}
und \Macro{markright}\IndexCmd{markright} are available.
\EndIndex{Cmd}{manualmark}

\BeginIndex{Cmd}{automark}
\begin{Declaration}
  \Macro{automark}\OParameter{right page}\Parameter{left page}
\end{Declaration}%
The macro \Macro{automark} however activates the automatic updating.
For the two parameters the designations of the document level
are to be used, whose title in appropriate place is to appear.
Valid values for the parameters are:
\PValue{chapter}, \PValue{section}, \PValue{subsection},
\PValue{subsubsection}, \PValue{paragraph} und \PValue{subparagraph}.

The optional argument \PName{right page} is meant understandably only for
two-sided documents.
In the one-sided case you should normally not use it.
With the help of the option \Option{autooneside} one can also adjust
that the optional argument in one-sided mode is ignored automatically,
see \autoref{sec:scrpage.basics.options}.
%
\begin{Example}
Assuming that the document uses a \emph{book} class,
which topmost section level is \emph{chapter},
then after a preceding \Macro{manualmark} 
\begin{small}
\begin{verbatim}
  \automark[section]{chapter}
\end{verbatim}
\end{small}
restores the original behaviour.
If one prefers one of the lower section levels in running head
following can be used.
\begin{small}
\begin{verbatim}
  \automark[subsection]{section}
\end{verbatim}
\end{small}
How useful the last declaration is, everybody has to decide
for oneself.
\end{Example}

\begin{Explain}
The data of the headings is set by the command
\Macro{markboth}\IndexCmd{markboth} for the top-most
section levels, for the lower levels
\Macro{markright}\IndexCmd{markright} or
\Macro{markleft}\IndexCmd{markleft} are used.
These commands are called indirectly by the sectioning-commands.
The macro \Macro{markleft} is provided by the package
\Package{scrpage2}.
Its definition is similar to \Macro{markright} originating from
the \LaTeX{} kernel.
Although \Macro{markleft} is not defined as an internal command,
the direct use is not recommended.
\end{Explain}
\EndIndex{Cmd}{automark}


\subsection{Formatting of Heading and Footing}
\label{sec:scrpage.basics.format}
% \headfont \pnumfont
% \setheadwidth \setfootwidth
% \set(head|foot)(top|sep|bot)line
In the previous paragraph it concerned mainly contentwise things. Is
not sufficient naturally, in order to satisfy the formative
ambitions. Therefore it is to turn in this paragraph exclusive therefore.
%
\BeginIndex{Cmd}{headfont}\BeginIndex{Cmd}{pnumfont}
\begin{Declaration}
\Macro{headfont}\\
\Macro{pnumfont}
\end{Declaration}%
\ScrpageMark{}%
The command \Macro{headfont} contains the commands
which determine the formatting of head and foot lines.
The style of the page number defines the command
\Macro{pnumfont}.
\begin{Example}
If, for example, one wants the head and foot to be typeset in bold
sans-serif and the page number in a slanted style, then it can be
used the configuration:
\begin{small}
\begin{verbatim}
  \renewcommand{\headfont}{\normalfont\sffamily\bfseries}
  \renewcommand{\pnumfont}{\normalfont\rmfamily\slshape}
\end{verbatim}
\end{small}
\end{Example}
\EndIndex{Cmd}{headfont}\EndIndex{Cmd}{pnumfont}
%
Since version 2.8p of the \KOMAScript{} classes a new
configuration scheme is implemented.
If \Package{scrpage2} is used together with these classes then
it is recommended to setup font attributes the way described
in \autoref{sec:maincls.font}.
\begin{Example}
This interfaces implements the command \Macro{setkomafont}
in order to configure the font attributes.
The previous definition can then be written as:
\begin{small}
\begin{verbatim}
  \setkomafont{pagehead}\normalfont\sffamily\bfseries}
  \setkomafont{pagenumber}{\normalfont\rmfamily\slshape}
\end{verbatim}
\end{small}
\end{Example}

\BeginIndex{Cmd}{setheadwidth}\BeginIndex{Cmd}{setfootwidth}
\begin{Declaration}
\Macro{setheadwidth}\OParameter{shift}\Parameter{width}\\
\Macro{setfootwidth}\OParameter{shift}\Parameter{width}
\end{Declaration}%
Normally the widths of heading and footing line
correspond to the width of the text body.
The commands \Macro{setheadwidth} and \Macro{setfootwidth} enable the
user to adapt in a simple manner the widths to his needs.
The mandatory argument \PName{width} takes up the value for the width
of the page head or foot,
\PName{shift} is a longitudinal dimension for the shift of the
appropriate item toward the outside page edge.

For the most common situations the mandatory argument \PName{width}
accepts the following symbolic values:
\begin{labeling}[\,--]{\PValue{textwithmarginpar}}
\item[\PValue{paper}] the width of the paper
\item[\PValue{page}] the width of the page
\item[\PValue{text}] the width of the text body
\item[\PValue{textwithmarginpar}] the width of the text body including margin.
\item[\PValue{head}] the current head width
\item[\PValue{foot}] the current foot width
\end{labeling}
The difference between \PValue{paper} and \PValue{page} is, that
\PValue{page} means the width of the paper less the binding correction.
This only applies if the package \Package{typearea}\IndexPackage{typearea}
is used (see \autoref{cha:typearea}).
Without \Package{typearea} both values are equal.

\begin{Example}
The layout of the \emph{\LaTeX\,Companion}, the head-line projects
into the margin, can be obtained with:
\begin{small}
\begin{verbatim}
  \setheadwidth[0pt]{textwithmarginpar}
\end{verbatim}
\end{small}
%
and looks on an odd page like this:
%
\begin{XmpTopPage}
        \XmpHeading{10,25}{85}
        \thinlines\XmpRule{10,23}{85}
        \XmpSetText[\XmpTopText]{10,21}
        \XmpMarginNote{83,11.8}
\end{XmpTopPage}
%
If the foot-line shall have the same width and alignment, then
two ways are possible. The first simply repeats the settings
for the foot-line:
\begin{small}
\begin{verbatim}
  \setfootwidth[0pt]{textwithmarginpar}
\end{verbatim}
\end{small}
%
In the second way the symbolic value \PValue{head} is used, since the
head has already the desired settings.
\begin{small}
\begin{verbatim}
  \setfootwidth[0pt]{head}
\end{verbatim}
\end{small}
\end{Example}

If no \PName{shift} is indicated,
i.e. without the optional argument, then
the heading or the foot appears symmetrically on the page arranged.
A value for the \PName{shift} is determined automatically, which
corresponds to the current page shape.
%
\begin{Example}
According to the previous example the optional argument is abandoned:
\begin{small}
\begin{verbatim}
  \setheadwidth{textwithmarginpar}
\end{verbatim}
\end{small}
%
and looks on an odd page like this:
%
\begin{XmpTopPage}
        \XmpHeading{5,25}{85}
        \thinlines\XmpRule{5,23}{85}
        \XmpSetText[\XmpTopText]{10,21}
        \XmpMarginNote{83,11.8}
\end{XmpTopPage}
\end{Example}

As to be seen, the heading is now shifted inward, while the
heading width has not changed.
The shift is calculated in a way that the configuration of the typearea
become visible also here.
%
\EndIndex{Cmd}{setheadwidth}\EndIndex{Cmd}{setfootwidth}

\BeginIndex{Cmd}{setheadtopline}\BeginIndex{Cmd}{setheadsepline}
\BeginIndex{Cmd}{setfootseptline}\BeginIndex{Cmd}{setfootbotline}
\begin{Declaration}
\Macro{setheadtopline}\OParameter{length}\Parameter{thickness}\\
\Macro{setheadsepline}\OParameter{length}\Parameter{thickness}\\
\Macro{setfootsepline}\OParameter{length}\Parameter{thickness}\\
\Macro{setfootbotline}\OParameter{length}\Parameter{thickness}
\end{Declaration}%
According to the configuration of head and foot there are
commands to modify the lines above and below the head and foot.

\begin{labeling}[\,--]{\Macro{setfootsepline}}
\item[\Macro{setheadtopline}] configures the line above the head
\item[\Macro{setheadsepline}] configures the line below the head
\item[\Macro{setfootsepline}] configures the line above the foot
\item[\Macro{setfootbotline}] configures the line below the foot
\end{labeling}

The mandatory argument \PName{thickness} determines,
how strongly the line is drawn.
The optional argument \PName{length} accepts the same symbolic values as
\PName{width} with \Macro{setheadwidth}, as also a normal length expression.
As long as in the document \PName{length} value was not assigned to the
optional argument, the appropriate line length adapts automatically
the width of the heading or the foot.

If one wants to restore this automatism, then the symbolic value
\PValue{auto} in the length argument can be useful.
\begin{Declaration}
\Macro{setheadtopline}\OParameter{auto}\Parameter{current}\\
\Macro{setheadtopline}\OParameter{auto}\Parameter{}
\end{Declaration}%
The arguments, here illustrated with the command \Macro{setheadtopline},
are of course valid for the other three configuration commands too.
If the mandatory parameter has the value \PValue{current} or has been
left empty, then the thicknes of the line keeps unchanged.
This can be used in order to modify the length but not the thickness.
\begin{Example}
Shall, for example, the line above the head be a strong line
with 2\,pt and the line between head head and body with 0.4\,pt,
then it can be achieved with:
\begin{small}
\begin{verbatim}
  \setheadtopline{2pt}
  \setheadsepline{.4pt}
\end{verbatim}
\end{small}
%
\begin{XmpTopPage}
        \XmpHeading{10,25}{70}
        \thinlines\XmpRule{10,23}{70}
        \thicklines\XmpRule{10,28}{70}
        \XmpSetText[\XmpTopText]{10,21}
        \XmpMarginNote{83,11.8}
\end{XmpTopPage}

The automatic adjustment of the head and foot width is illustrated
in the following example:
\begin{small}
\begin{verbatim}
  \setfootbotline{2pt}
  \setfootsepline[text]{.4pt}
  \setfootwidth[0pt]{textwithmarginpar}
\end{verbatim}
\end{small}

% \phantomsection for hyperref-\pageref-links jum-2001/11/24
\phantomsection\label{page:scrpage.autoLineLength}
\begin{XmpBotPage}
        \XmpHeading{10,18}{85}
        \thinlines\XmpRule{17,21}{70}
        \thicklines\XmpRule{10,16}{85}
        \XmpSetText[\XmpBotText]{10,33}
        \XmpMarginNote{83,24}
\end{XmpBotPage}
\end{Example}

Now not everybody will like the alignment of the line above
the foot, instead one will expect the line left-aligned.
This can only be achieved with a global package option, which
will be described together with other package option
in the next \autoref{sec:scrpage.basics.options}.
\EndIndex{Cmd}{setheadtopline}\EndIndex{Cmd}{setheadsepline}
\EndIndex{Cmd}{setfootseptline}\EndIndex{Cmd}{setfootbotline}

\subsection{Package Options}\label{sec:scrpage.basics.options}
% head(in|ex)clude foot(in|ex)clude --> typearea
% headtopline headsepline footbotline footsepline (plain...)
% komastyle standardstyle
% markuppercase markusecase
% automark manualmark

\BeginIndex{Option}{headinclude}\BeginIndex{Option}{footinclude}
\BeginIndex{Option}{headexclude}\BeginIndex{Option}{footexclude}
\begin{Declaration}
\Option{headinclude}\\
\Option{headexclude}\\
\Option{footinclude}\\
\Option{footexclude}
\end{Declaration}%
These options intend whether the page-header or that page-footing
are reckoned in with the page-body for the calculation of the type-area.
The adjustments necessary by the use of these parameters
are made by the package
\Package{typearea} (see \ref{sec:typearea.options}), if this
package is loaded after \Package{scrpage2}.
Important is here that on use of a \KOMAScript{} class
these options must be indicated for the document class and not
for \Package{scrpage2}, in order to obtain an effect.
%
\EndIndex{Option}{headinclude}\EndIndex{Option}{footinclude}
\EndIndex{Option}{headexclude}\EndIndex{Option}{footexclude}

\BeginIndex{Option}{headtopline}\BeginIndex{Option}{plainheadtopline}
\BeginIndex{Option}{headsepline}\BeginIndex{Option}{plainheadsepline}
\BeginIndex{Option}{footsepline}\BeginIndex{Option}{plainfootsepline}
\BeginIndex{Option}{footbotline}\BeginIndex{Option}{plainfootbotline}
\begin{Declaration}
\Option{headtopline} und \Option{plainheadtopline}\\
\Option{headsepline} und \Option{plainheadsepline}\\
\Option{footsepline} und \Option{plainfootsepline}\\
\Option{footbotline} und \Option{plainfootbotline}
\end{Declaration}%
A basic adjustment for the lines under and over heading and footing
can be made with these options.
These adjustments are considered then as default to all
page styles defined with \Package{scrpage2}.
If one of these options is used, then a line thickness
is used by 0.4\,pt.

Since there is an appropriate \PValue{plain}-style to the page style
\PValue{scrheadings}, with the \Option{plain\dots}-options also the
appropriate line of the plain style can be configured.
These \Option{plain}-options work however only, even if the
corresponding option without plain are activated.
Thus \Option{plainheadtopline} shows no effect without the
\Option{headtopline} option set.

With these options it is to be noted that the appropriate page part,
heading or footing, is reckoned in with the text-area
for the calculation of the type-area in case a line has been activated.
This means, if with \Option{headsepline} the separation-line 
between heading and text is activated, then the packge \Package{typearea}
calculates the type-area in such a way that the page-header
is part of the text block automatically.

The conditions for the options of the preceding paragraph, apply also to
this automatism. That means that the package \Package{typearea}
must be loaded to scrpage2, or that on use of a \KOMAScript{} class,
the options \Option{headinclude} and \Option{footinclude}
must be set explicitly with \Macro{documentclass} in order to
transfer heading or footing line in the text-area.
%
\EndIndex{Option}{headtopline}\EndIndex{Option}{plainheadtopline}
\EndIndex{Option}{headsepline}\EndIndex{Option}{plainheadsepline}
\EndIndex{Option}{footsepline}\EndIndex{Option}{plainfootsepline}
\EndIndex{Option}{footbotline}\EndIndex{Option}{plainfootbotline}

\BeginIndex{Option}{ilines}%
\BeginIndex{Option}{clines}%
\BeginIndex{Option}{olines}%
\Index{rule}\Index{line}%
\begin{Declaration}
\Option{ilines}\\
\Option{clines}\\
\Option{olines}
\end{Declaration}%
%
The definition of the line lengths can lead to an
undesired adjustment, since
the line is centered in the heading or footing area.
With the package options presented here, this specification can be
modified for all page styles defined with \Package{scrpage2}.
The option \Option{ilines} sets the adjustment in such a
way that the lines align to the inside edge.
The option \Option{clines} behaves like the standard adjustment and
\Option{olines} aligns at the outside edge.

\begin{Example}
The next example illustrates the influence of the
option \Option{ilines}. Please compare to the example for
\Macro{setfootsepline} on \autopageref{page:scrpage.autoLineLength}.
  \begin{small}
\begin{verbatim}
  \usepackage[ilines]{scrpage2}
  \setfootbotline{2pt}  
  \setfootsepline[text]{.4pt}
  \setfootwidth[0pt]{textwithmarginpar}
\end{verbatim}
  \end{small}

Only the use of the option \Option{ilines} leads to the different
result shown below:
\begin{XmpBotPage}
        \XmpHeading{10,18}{85}
        \thinlines\XmpRule{10,21}{70}
        \thicklines\XmpRule{10,16}{85}
        \XmpSetText[\XmpBotText]{10,33}
        \XmpMarginNote{83,24}
\end{XmpBotPage}
 In contrast to the default configuration the separation line
 between text and foot is now left-aligned not centered.
\end{Example}
\EndIndex{Option}{ilines}\EndIndex{Option}{clines}\EndIndex{Option}{olines}

% \phantomsection for hyperref-\pageref-links jum-2001/11/24
\phantomsection\label{page:scrpage.automark}%
\BeginIndex{Option}{automark}\BeginIndex{Option}{manualmark}
\begin{Declaration}
\Option{automark}\\
\Option{manualmark}
\end{Declaration}%
These options set the adjustment at the beginning of the document
whether automatic updating of the running headlines takes place.
The option \Option{automark} switches the automatic updating on,
\Option{manualmark} deactivates it.
Without use of one of the two options the adjustment is preserved,
which was valid while the loading of the package.
%
\begin{Example}
One loads the package \Package{scrpage2} directly after the document
class \Class{scrreprt} without any package options.
  \begin{small}
\begin{verbatim}
  \documentclass{scrreprt}
  \usepackage{scrpage2}
\end{verbatim}
  \end{small}
Since the default page style of \Class{scrreprt} is \PValue{plain},
this page style is also active yet.
Futhermore \PValue{plain} means manual headings.
If one now activates the page style \PValue{scrheadings} with
  \begin{small}
\begin{verbatim}
  \pagestyle{scrheadings}
\end{verbatim}
  \end{small}
then the manual headings are always active. 

If one uses the document class \Class{scrbook} instead, then after:
  \begin{small}
\begin{verbatim}
  \documentclass{scrbook}
  \usepackage{scrpage2}
\end{verbatim}
  \end{small}
the page style \PValue{headings} is active and the running headings
are updated automatically.
Switching to the page style \PValue{scrheadings} keeps this
setting present.
The marking-commands of \Class{scrbook} continue to be used.

However, the use of
  \begin{small}
\begin{verbatim}
  \usepackage[automark]{scrpage2}
\end{verbatim}
  \end{small}
activates the automatic update of the running heading independent
from the used document class.
The option does not effect the used page style \PValue{plain} of
the class \Class{scrreprt}.
The headings are not visible until the page style has been changed to
\PValue{scrheadings}\IndexPagestyle{scrheadings},
\PValue{useheadings} or another self-defined page style with headings.
\end{Example}
\EndIndex{Option}{automark}\EndIndex{Option}{manualmark}

\BeginIndex{Option}{autooneside}
\begin{Declaration}
  \Option{autooneside}
\end{Declaration}%
This option ensures that the optional parameter of
\Macro{automark}\IndexCmd{automark} will be ignored automatically
in one-side mode. See the explanation of the command
\Macro{automark} in \autoref{sec:scrpage.basics.mark}.
\EndIndex{Option}{autooneside}

\BeginIndex{Option}{komastyle}\BeginIndex{Option}{standardstyle}
\begin{Declaration}
\Option{komastyle}\\
\Option{standardstyle}
\end{Declaration}%
These options determine the kind of the pre-defined page style
\PValue{scrheadings}.
The option \Option{komastyle} takes up a configuration like
the \KOMAScript{} classes.
This is the default for \KOMAScript{} classes and can this way
also be set for other classes.

A configuration expected from the standard classes can be
defined using option \Option{standardstyle}.
Automatically the option \Option{markuppercase} will be
activated, but only if option \Option{markusedcase} is not given.
\EndIndex{Option}{komastyle}\EndIndex{Option}{standardstyle}

\BeginIndex{Option}{markuppercase}\BeginIndex{Option}{markusedcase}
\begin{Declaration}
\Option{markuppercase}\\
\Option{markusedcase}
\end{Declaration}%
The package \Package{scrpage2} has
to modify internal commands, which are used by document structuring
commands, in order to get the function of \Macro{automark} working.
Since some classes, in contrast to the \KOMAScript{} classes,
write the headings in uppercase letters, \Package{scrpage2}
has to know how the used document class represents the headings.

Option \Option{markuppercase} shows \Package{scrpage2} that
the document class uses uppercase letters.
If the document class does not represent the headings in
uppercase letters the option \Option{markusedcase} should
be given.
These options are not suitable to force a representation, thus
unexpected effects may occur, if the given option does not match
the behaviour of the document class.
\EndIndex{Option}{markuppercase}\EndIndex{Option}{markusedcase}

\begin{Declaration}
  \Option{nouppercase}
\end{Declaration}%
\BeginIndex{Option}{nouppercase}%
In the previous paragraph about \Option{markuppercase} and
\Option{markusedcase} it has been already stated that some
document classes represent the running headings\Index{heading} in
uppercase letters using the commands
\Macro{MakeUppercase} or \Macro{uppercase}.
Setting the option \Option{nouppercase} allows to disable these
both commands.
The option \Option{nouppercase} only is valid as long page styles
defined by \Package{scrpage2} are used, including
\PValue{scrheadings} and its appropriate \PValue{plain} page style.

The applicated method is very brutal and can cause that desired
changes of normal letters to uppercase letters
\Index{uppercase letters} do not occur.
Since these cases appear not frequently the option \Option{nouppercase}
is a useful solution.

\begin{Example}
If a document uses the standard class \Class{book}\IndexClass{book},
but the uppercase headings are not desired, then the preamble of
the document could start with:
  \begin{small}
\begin{verbatim}
  \documentclass{book}
  \usepackage[nouppercase]{scrpage2}
  \pagestyle{scrheadings}
\end{verbatim}
  \end{small}
  The selection of the page style \PValue{scrheadings} is necessary,
  since otherwise the page style \PValue{headings} is active, which
  does not respect the settings made by option \Option{nouppercase}.
\end{Example}

In some cases not only classes but also packages set the running
headings in uppercase letters.
Also in these cases the option \Option{nouppercase} should be able
to switch back to the normal non-uppercase headings.
\EndIndex{Option}{nouppercase}

\section{Defining Own Page Styles}\label{sec:scrpage.UI}
%
% 
\subsection{The Interface for Beginners}\label{sec:scrpage.UI.user}
% \deftripstyle
\BeginIndex{Cmd}{deftripstyle}\Index{page style}

Now one would not always be bound only to the provided page styles,
but moreover there will be the wish to define own page styles.
Sometimes there will be a special need, since a specific
\emph{Corporate Identity} requires the declaration of own page styles.
The easiest way to deal with is:
\begin{Declaration}
\Macro{deftripstyle}\Parameter{name}%
\OParameter{LO}\OParameter{LI}%
\Parameter{HI}\Parameter{HC}\Parameter{HO}%
\Parameter{FI}\Parameter{FC}\Parameter{FO}
\end{Declaration}%
\ScrpageMark{}%
The parameters have the following meaning:
\begin{labeling}[\,--]{\PName{Name}}
\item[\PName{name}] the name of the page style, in order to activate them
        using the command \Macro{pagestyle}\Parameter{name}
\item[\PName{LO}] the thickness of the outside lines,
        i.e. the line above the head
        and the line below the foot (optional)
\item[\PName{LI}] the thickness of the separation lines,
        i.e. the line below the head
        and the line above the foot (optional)
\item[\PName{HI}] contents of the inside box in the page head for two-side
        layout or left for one-side layout
\item[\PName{HC}] contents of the centered box in the page head
\item[\PName{HO}] contents of the outside box in the page head for two-side
        layout or right for one-side layout
\item[\PName{FI}] contents of the inside box in the page foot for two-side
        layout or left for one-side layout
\item[\PName{FC}] contents of the centered box in the page foot
\item[\PName{FO}] contents of the outside box in the page foot for two-side
        layout or right for one-side layout
\end{labeling}

The command \Macro{deftripstyle} surely represents the simplest
possibility of defining page styles.
Unfortunately also restrictions are connected with since in a
page range with one via deftripstyle defined page style
no modification of the lines above and below heading and footing
can take place.

\begin{Example}
Assuming a two-side layout, where the running headings are placed inside.
Furthermore the document title, here "`Report"`, shall be placed outside
in the head, the page number is centered in the foot.
\begin{small}
\begin{verbatim}
  \deftripstyle{TheReport}%
                {\headmark}{}{Report}%
                {}{\pagemark}{}
\end{verbatim}
\end{small}

Shall moreover the lines above the head and below the foot be
drawn with a thickness of 2\,pt and the text body be separated
from head and foot with 0.4\,pt lines, then the definition has to
be extended.
\begin{small}
\begin{verbatim}
  \deftripstyle{TheReport}[2pt][.4pt]%
                {\headmark}{}{Report}%
                {}{\pagemark}{}
\end{verbatim}
\end{small}
%
\typeout{^^J--- Ignore underfull and overfull \string\hbox:}
\begin{center}\setlength{\unitlength}{1mm}\begin{picture}(100,50)\scriptsize
\thinlines
\put(5,0){\line(0,1){50}}
\put(55,0){\line(0,1){50}}
\put(5,50){\line(1,0){40}}
\put(55,50){\line(1,0){40}}
%
\thicklines
\put(45,0){\line(0,1){50}}
\put(95,0){\line(0,1){50}}
\put(5,0,){\line(1,0){40}}
\put(55,0){\line(1,0){40}}
%
\XmpHeading[Report\hfill 2. The Eye]{11,46}{30}
\XmpHeading[2.1 Retina\hfill Report]{59,46}{30}
\XmpHeading[\hfill 14\hfill]{11,6.5}{30}
\XmpHeading[\hfill 15\hfill]{59,6.5}{30}
\put(11,43){\makebox(0,0)[tl]{\parbox{30mm}{\tiny%
        \textbf{2.1 Retina}\\
        \XmpText[49]}}}
\put(59,43){\makebox(0,0)[tl]{\parbox{30mm}{\tiny%
        \XmpText[51]}}}
%
\thinlines
\XmpRule{11,44.5}{30}\XmpRule{59,44.5}{30}
\XmpRule{11,8}{30}\XmpRule{59,8}{30}
\linethickness{1pt}
\XmpRule{11,48}{30}\XmpRule{59,48}{30}
\XmpRule{11,5}{30}\XmpRule{59,5}{30}
\end{picture}\end{center}
\typeout{^^J--- Don't ignore underfull and overfull \string\hbox:^^J}
\end{Example}
\EndIndex{Cmd}{deftripstyle}

\subsection{The Interface for Experts}\label{sec:scrpage.UI.expert}
% \defpagestyle \newpagestyle \providepagestyle \renewpagestyle
\BeginIndex{Cmd}{defpagestyle}\BeginIndex{Cmd}{newpagestyle}
\BeginIndex{Cmd}{renewpagestyle}\BeginIndex{Cmd}{providepagestyle}
\Index{page style}
Simple page styles, how they can be defined with \Macro{deftripstyle},
are rare according to experience.
Either a professor requires that the thesis looks in
such a way like its own, and who wants to contradict
it seriously, or a company would like that the half
financial department emerges in the page footing.
No problem, the solution is:
%
\begin{Declaration}
\Macro{defpagestyle}\Parameter{name}\Parameter{head-definition}\Parameter{foot-definition}\\
\Macro{newpagestyle}\Parameter{name}\Parameter{head-definition}\Parameter{foot-definition}\\
\Macro{renewpagestyle}\Parameter{name}\Parameter{head-definition}\Parameter{foot-definition}\\
\Macro{providepagestyle}\Parameter{name}\Parameter{head-definition}\Parameter{foot-definition}
\end{Declaration}%
\ScrpageMark{}%
These four commands give full access to the capabilities of
\Package{scrpage2} according to define page styles.
Their structure is indentical, they differ only the manner of working.

\begin{labeling}[\,--]{\Macro{providepagestyle}}
\item[\Macro{defpagestyle}] defines always a new pagestyle.
If a page style with this name already exists it will be overwritten.
\item[\Macro{newpagestyle}] defines a new pagestyle.
If a page style with this name already exists a error message will be given.
\item[\Macro{renewpagestyle}] redefines a pagestyle.
If apage style with this name does not exist a error message will be given.
\item[\Macro{providepagestyle}] defines a new pagestyle,
but only if there is no page style with that name already present.
\end{labeling}

The syntax of the four commands is explained on command
\Macro{defpagestyle} examplary.
\begin{labeling}[\,--]{\PName{head definition}}
\item[\PName{name}] the name of the page style for
        \Macro{pagestyle}\Parameter{name}
\item[\PName{head-definition}]  the declaration of the heading consisting
        of five element; elements in round parenthesis are optional:\\
\AParameter{ALL,ALT}\Parameter{EP}\Parameter{OP}\Parameter{OS}\AParameter{BLL,BLT}
\item[\PName{foot-definition}]  the declaration of the footing consisting
        of five element; elements in round parenthesis are optional:\\  
\AParameter{ALL,ALT}\Parameter{EP}\Parameter{OP}\Parameter{OS}\AParameter{BLL,BLT}
\end{labeling}

It can be seen, that head and foot declaration are identical.
The parameters have the following meaning:
\begin{labeling}[\,--]{\PName{OLD}}
\item[\PName{ALL}] above line length: (head = outside, foot = separation line)
\item[\PName{ALT}] above line thickness
\item[\PName{EP}]  definition for \emph{even} pages
\item[\PName{OP}]  definition for \emph{odd} pages
\item[\PName{OS}]  definition for \emph{one-side} layout
\item[\PName{BLL}] below line length: (head = separation line, foot = outside)
\item[\PName{BLT}] below line thickness
\end{labeling}

If the optional line-parameters are omitted, then the line behaviour keeps
configurable by the commands introduced in \autoref{sec:scrpage.basics.format}.
In the old version \Package{scrpage}\ScrpageNote{} the line-parameters
are mandatory.

The three elements \PName{EP}, \PName{OP} and \PName{OS} are boxes with
the width of page head or foot respectively.
The definition occur on the left side in the box, thus the space between
two text elements has to be stretched using \Macro{hfill}, in order to
write the first text element on the left edge \emph{and} the second text
element on the right edge.
%
\begin{verbatim}
  {\headmark\hfill\pagemark}
\end{verbatim}

If one would like a third text-element centered in the box, then an
extended definition must be used.
The commands \Macro{rlap} and \Macro{llap} simply write the given
arguments, but for \LaTeX{} they take no horizontal space.
Only this way the middle text is really centered.
%
\begin{verbatim}
  {\rlap{\headmark}\hfill centered text\hfill\llap{\pagemark}}
\end{verbatim}

This and more examples of the expert's interface and other commands
provided by \Package{scpage2} follow now in the final example.

\begin{Example}
This examples uses the document class \Class{scrbook}, which
means that the default page layout is two-side.
While the loading of the package \Package{scrpage2} the
options \Option{automark} and \Option{headsepline} are
given.
The first switches on the automatic update of running
headings, the second determines that a separation line between
head and text-body is drawn in the \PValue{scrheadings} page style.

\begin{small}\begin{verbatim}
  \documentclass{scrbook}
  \usepackage[automark,headsepline]{scrpage2}
\end{verbatim}\end{small}

The expert's interface is used to define two page styles.
The page style \PValue{withoutLines} does not define any 
line parameters.
The second page style \PValue{withLines} defines
a line thicknes of 1\,pt for the line above the head
and 0\,pt for the separation-line between head and text.

\begin{small}\begin{verbatim}
  \defpagestyle{withoutLines}{%
    {Example\hfill\headmark}{\headmark\hfill without lines}
    {\rlap{Example}\hfill\headmark\hfill%
     \llap{without lines}}
  }{%
    {\pagemark\hfill}{\hfill\pagemark}
    {\hfill\pagemark\hfill}
  }
\end{verbatim}\end{small}

\begin{small}\begin{verbatim}
  \defpagestyle{withLines}{%
    (\textwidth,1pt)
    {with lines\hfill\headmark}{\headmark\hfill with lines}
    {\rlap{\KOMAScript}\hfill \headmark\hfill%
     \llap{with lines}}
    (0pt,0pt)
  }{%
    (\textwidth,.4pt)
    {\pagemark\hfill}{\hfill\pagemark}
    {\hfill\pagemark\hfill}
    (\textwidth,1pt)
  }
\end{verbatim}\end{small}

At the document's begin the page style \PValue{scrheadings}
is choosen.
The command \Macro{chapter} starts a new chapter and sets
automatically the page style for this page to \PValue{plain}.

The command \Macro{chead} shows how running headings can
be represented even on a \PValue{plain} page.
Running headings on chapter start-pages are not usual,
since in this case the page looses its emphasis-character.
Basically it is more important to show that a new
chapter starts here than that a section of this page has
a special title.

\begin{Explain}% not important, only to enhance the paragraph breaking
Instead of \Macro{leftmark} one would expect
the use of \Macro{rightmark} in the parameter
of \Macro{chead}, since the chapter starts on an even
page. But, because of internal \LaTeX{} definitions,
this does not work. It only returns an empty string.
\end{Explain}
\begin{small}\begin{verbatim}
  \begin{document}
  \pagestyle{scrheadings}
  \chapter{Thermodynamics}
  
  \chead[\leftmark]{}
  
  \section{Main Laws}
  Every system has an extensive condition unit called
  Energy. In a closed system the energy is constant.
\end{verbatim}\end{small}

\begin{XmpTopPage}
        \XmpHeading[\hfill\textsl{1. Thermodynamics}\hfill]{10,27}{70}
        \put(10,17){\normalsize\textbf{\sffamily 1.Thermodynamics}}
        \put(10,12){\textbf{\sffamily 1.1 Main Laws}}
        \XmpSetText[%
        Every System has an extensive condition unit]{10,9}
\end{XmpTopPage}

After starting a new page the page style \PValue{scrheadings}
is active and thus the separation line below the heading is
visible.
\begin{small}\begin{verbatim}
  There is a condition unit of a system, called entropy,
  which temporal alteration consits of entropy stream
  and entropy generation.
\end{verbatim}\end{small}
\begin{XmpTopPage}
        \XmpHeading[\textsl{1. Thermodynamics}\hfill]{20,27}{70}
        \thinlines\XmpRule{20,25}{70}
        \XmpSetText[%
          There is a condition unit of a system, called entropy,
          which temporal alteration consits of entropy stream
          and entropy generation.]{20,20}
\end{XmpTopPage}

After switching to the next page, the automatic update of the
running headings is disabled using \Macro{manualmark}.
The page style \PValue{withoutLines} becomes active.
Since no line parameters are given in the definition of this
page style, the default configuration is used, which draws
a separation line between head and text-body.
\begin{XmpTopPage}
        \XmpHeading[\slshape Energy Conversion\hfill without lines]{10,27}{70}
        \thinlines\XmpRule{10,25}{70}
        \XmpSetText[%
        \textbf{\sffamily 1.2 Exergy and Anergy}\\
        While the transition of a system to an equilibrium state
  with its environment the maximum work gainable is called
  exergy.]{10,21}
\end{XmpTopPage}

\begin{small}\begin{verbatim}
  \manualmark
  \pagestyle{withoutLines}
  \section{Exergy and Anergy}\markright{Energy Conversion}
  While the transition of a system to an equilibrium state
  with its environment the maximum work gainable is called
  exergy.
\end{verbatim}\end{small}

At the next page of the document the page style \PValue{withLines}
is activated.
The line settings of its definition are taken in account and the
lines are drawn accordingly.
\begin{small}\begin{verbatim}
  \pagestyle{mitLinien}
  \renewcommand{\headfont}{\itshape\bfseries}
  The portion of an energy not conversable in exergie
  is named anergy \Var{B}.
  \[ B = U + T (S_1 - S_u) - p (V_1 - V_u)\] 
  \end{document}
\end{verbatim}\end{small}
\begin{XmpTopPage}
        \XmpHeading[\itshape\bfseries with lines\hfill 1. Thermodynamics]{20,27}{70}
        \thicklines\XmpRule{20,29}{70}
        \XmpSetText[%
        The portion of an energy not conversable in exergie
        is named anergy $B$. 
  \[ B = U + T (S_1 - S_u) - p (V_1 - V_u)\] ]{20,20}
\end{XmpTopPage}
\end{Example}
\EndIndex{Cmd}{defpagestyle}\EndIndex{Cmd}{newpagestyle}
\EndIndex{Cmd}{renewpagestyle}\EndIndex{Cmd}{providepagestyle}

\subsection{Managing Page Styles}\label{sec:scrpage.UI.cfgFile}
% scrpage.cfg
\BeginIndex{File}{scrpage.cfg}
Before long the work with different page styles will establish a
common set of employed page styles, depending on taste and tasks.
In order to make the management of page styles easier,
\Package{scrpage2} reads after initialisation the file \File{scrpage.cfg}.
This file can contain a set of user-defined page styles, which
many projects can share.
\EndIndex{File}{scrpage.cfg}

\section{Authors}
\label{sec:scrpage.authors}
The authors listed below are responsible for this chapter or have
contributed to this chapter in different ways.
% Please use \textit{} for the name of the translator add all the
% names of the untranslated german file. If the translator is the
% main author, simply use \textbf. 
\begin{itemize}
\item Markus Kohm \TextEMail{Markus.Kohm@gmx.de}
\item \textbf{Jens-Uwe Morawski}
\end{itemize}
\EndIndex{Package}{scrpage2}
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