DESCRIPTION:

Set display flags for the current view. This is used to force
rendering or redisplaying after changes. The bits of the variable
have the following meaning:
0x0001 - Rerender
0x0002 - Redisplay
0x0004 - Remerge when multirendering
0x0008 - Force display, even if view is frozen
0x0020 - Clear screen before redrawing
0x0040 - Resize window before redrawing
0x0100 - Mark frame for saving
0x0400 - Force slow rendering (nofast)
0x0800 - Mark view as fastrendered