\chapter{Sample execution of RVadd}

\subsubsection
When the program is started, a title screen is shown, Figure ***.  There
is a single button on this screen, labelled ``Next''.  Clicking on this
button will bring up the second screen (Figure ***), which displays the
equations of convolution.  Clicking on the ``Next'' button here will
bring up the screen in Figure ***.  This screen shows the two variables and
their sum across the top, and there are buttons at the bottom of the
screen to show the table of calculations and to edit the PMFs.
