The Suspend New Desk Accessory allows you to temporarily stop a desktop program and return to the text shell. To return to the desktop program, simply type the foreground command, ``fg''.
You may put desktop programs in the background (through the ``bg'' command) at your own risk. This is not guaranteed to work for all programs, and putting a desktop program in the background will not put the Apple IIgs in text mode.
Also, do not run another desktop program when one is currently suspended. The GNO kernel tries to cleanly terminate the second program, but may not always be able to accomplish this.