DOCU_VP alters the display within a viewport.
---->(DOCU_VP)---|viewport_name|---+---(:CENTER_VP)--|center pnt|----------+---->
| |
+---(:WINDOW_VP)--|1st pnt|--|2nd pnt|--+
| |
+---(:LAST_VP)--------------------------+
| |
+---(:FIT_VP)---------------------------+
- :CENTER_VP determines a new center point for the viewport.
- :WINDOW_VP specifies a window (by two corner points) in the current
viewport to be the new viewport display. The new box may be expanded
in one direction to fill the entire viewport.
- :LAST_VP redisplays the previous window onto the viewport.
- :FIT_VP redraws the viewport so that the current drawlist contents
fit within the boundary of the viewport window.
Use this action to adjust the display of a viewport's contents. Use :CENTER_VP to
recenter the display, :WINDOW_VP to expand a portion of the current viewport to
fill the entire viewport, :LAST_VP to display the previous viewport, and :FIT_VP
to adjust the viewport's display to contain the drawlist data.
DOCU_VP_REDRAW terminate action