Recall that the DispG screen contains the graphical output of Xcas. You can use the DispG command (without parentheses) to bring it up; entering
will open the graphics screen.
To clear the graphics screen, you can use the ClrGraph command. If you enter
then the DispG screen will be erased.
You can close the DispG screen with the DispHome command; entering
will make the graphics screen go away.