Refresh

Syntax is:

Refresh;

            In general, you may think of the graph3D as implementing "retained mode" graphics, as opposed to "immediate mode" graphics.  Both types of actors are "retained," that is, remain on the screen through various actions (such as navigation and other animation), but anonymous actors may not be manipulated individually by your scripts, or selected.  Named actors are placed in the scene, or removed from it, by selecting them into it either by program, or from a menu.  Anonymous actors are removed when you "refresh" the screen from the menu, or when you issue the refresh command from a program. 

The refresh command has the effect of removing from the scene any anonymous actors. It does not reset the scene or affect named actors. You may remove named actors by shifting them out of the frustum or from the menu by selecting a new scene.

            You may also refresh the screen from the menu:

Scene, Refresh;