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.VE $Header: /usr/s/current/s/.help/RCS/hp150,v 1.2 85/03/05 07:46:15 rab Exp $
.FN hp150
.TL
hp150: Hewlett-Packard Touch-Screen Terminal
.CS
hp150(ask)
.PP
.AG ask
logical, should the driver print the message "GO?" to ask permission
to clear the screen?  Default TRUE.
This allows further viewing, making a hard copy, etc., before
the screen is erased. When ready for plotting, simply hit 
return.
.PP
Graphic input is controlled by the touch screen.
You point at the desired position on the screen, and leave your finger
touching the screen.  Fine adjustments in screen position are made
by dragging your finger around on the screen.  The cursor will follow
the motion of your finger, but in small steps.
Once you have positioned the cursor appropriately, remove your
finger from the screen.
.PP
There are eight character sizes (1 to 8)
and characters
can be rotated by multiples of 90 degrees.
There are 7 line types (1 to 7) giving solid, dotted, short-dashed,
long-dashed, dot-space-dash, dot-dot-dot and dot-dashed lines.
The device can fill polygons (e.g. in barplots, pie charts) in
eight patterns: solid, small checkerboard, large checkerboard,
one white/3 black, very large checkerboard, spiral, diamond, and lattice.
.PP
A device must be specified before any graphics functions can be used.
.KW device*
.WR
