COMMAND NAME:

        VPADD

USAGE:

        VPADD <pt> <pt>

        This command is used to add a viewport to the graphics area.
Viewports provide separate display windows of the same graphics database.
The two points determine the area of the screen the viewport will occupy.
You may create up to 26 viewports simultaneously,
named from A through Z.

        Graphics are reflected in all viewports simultaneously.
The currently selected viewport is highlighted with the
standard blue window border; all other viewports have a red window border.
You may make a viewport the "current" one by pressing a mouse button within it
(except when executing a viewport command, such as VPADD).
Windowing operations only affect the current viewport.
The overview window displays the relationship between
the database and the current viewport only.

        Viewports may overlap other viewports,
though this has the side effect of greatly reducing graphics speed.

        Viewports may be deleted by using the VPDELETE command.
Viewports may have their size changed via the VPSTRETCH command,
and be moved using the VPMOVE command.  The hierarchy
of viewports can be changed with the VPTOP and VPBOTTOM commands.
Viewports may be copied using the VPCOPY command.

        Pressing a button on the viewport border causes that
viewport to surface to the top of the hierarchy,
as if the VPTOP command had been executed.

