.LP
Use the "Plot Type" toggle to select the type of plot you would like
to display.  If only one plot is displayed, that plot
will be immediately re-displayed as the new plot type. If more than one
plot is displayed, a list widget will come up so that one may select which
plot(s) should be changed to the new plot type.   If some plots are hidden,
those plots will not appear in the list widget, as one may only change the
plot type of a displayed plot, not one that is hidden.  
.LP
The following is a list of different plot types:
.sp
.IP "2D     "
Stardard 2D continuous plot.
.IP Discrete
Standard discrete plot.
.IP "Bar Graph"
A standard bar graph with the left side of the bar at each X data point.
.IP Polymarker
At each data point a marker is placed of type specified by the
Marker Type option.
.IP Linemarker
This is a continuous 2D plot with a marker placed at each data point.
