This application software resets a graphics device. In effect the device
is cleared. It purges the graphics-database entries for the device. Optionally, only
the current picture is cleared and the database unchanged. (Note the clearing of the
current picture may not work on some graphics devices.)
CURRENT = _LOGICAL (Read)
TRUE then only the current
picture is cleared.
DEVICE = DEVICE (Read)
The graphics device to be
[Current graphics device
gdclear Clears the current
graphics device and purges its graphics-database entries.
gdclear current Clears
the current picture on the current graphics device.
gdclear xw Clears the xw
device and purges its graphics-database entries.