SCREEN Statement Details
 
Syntax
  SCREEN [mode][,[colorswitch]][,[apage]][,[vpage]]
 
  Argument      Description
  mode          An integer constant or expression indicating the
                screen mode. See <SCREEN MODE SUMMARY> for a list of
                the valid mode numbers.
  colorswitch   Determines whether color is displayed on composite
                monitors. The colorswitch is a numeric expression in
                the range 0-255.
                  - When it is true (nonzero), color is disabled and only
                    black and white images are displayed.
                  - When colorswitch is false (zero), images are in color.
                  - The meaning of the colorswitch argument is inverted in
                    screen mode 0.
                In screen modes 2 and up, colorswitch is ignored.
  apage         A numeric expression that is the number of the screen
                page that text output or graphics commands write to.
                See <ADAPTERS AND DISPLAYS> for the number of pages
                available for each graphics adapter.
  vpage         A numeric expression that is the number of the screen
                page being displayed.
See Also
  <SCREEN MODE SUMMARY>             Lists capabilities of each screen mode
  <ADAPTERS AND DISPLAYS>           Lists the screen modes for specific
                                  combinations of adapters and displays
  <COLOR NUMBERS AND ATTRIBUTES>    Lists the default color attributes for
                                  different screen modes