PS3 SAVE turns context saving on and off for the Adobe PostScript 3 personality.
This item will not appear unless the A-32 module for Adobe PostScript 3 is installed.
Context saving is not performed for Adobe PostScript 3. After the
printer switches to the PCL personality, the PostScript resources
Context saving is performed for PostScript. The PostScript
resources remain in the memory after the printer switches to the
PCL personality for a PCL print job.
The Standard Printing Environment Settings