Includes (value=0) or excludes (value=1) the device specification in the special variable $ZDIRECTORY. Refer to the "Intrinsic Special Variables" chapter in this manual for more information.

LINKing a GT.M image with a modified GTM$DEFAULTS alters the default for that image. For more information on GTM$DEFAULTS see the "Changing a Run-time Parameter" section in this chapter.