Function: GGIXOR Purpose: Set or clear Ggi non-destructive drawing mode. Category: GRAPHICS File: pgplot.src Author: J.P. Terlouw Use: LOGICAL GGIXOR( MODE ) GGIXOR - previous drawing mode MODE - .TRUE. : start non-destructive drawing. .FALSE. : stop non-destructive drawing. Description: This subroutine checks whether the device is of type "GGI" and if this is true, then instructs the driver to enter the desired mode. Driver function code 23 ('escape') is used for this. If the device is not "GGI", no action is taken. Updates: Oct 26, 1995: JPT Document created.