COMMAND NAME:

        VPBOTTOM

USAGE:

        VPBOTTOM <pt>

        This command is used to adjust the hierarchy of viewports
in the graphics area.  The point is used to find the closest corner of the
closest viewport, which is then moved to the bottom of the hierarchy
(is covered by any other viewport which overlaps it).

        You cannot hide the main graphics window with VPBOTTOM -
you can only use VPBOTTOM on a viewport which was
created by the VPADD or VPCOPY commands.

