/POP (default)
/NOPOP
Controls whether a specified display is placed at the top of the
display pasteboard, ahead of any other displays but behind the
PROMPT display. By default (/POP), the display is placed at the
top of the pasteboard and hides any other displays that share the
same region of the screen, except the PROMPT display.
The /NOPOP qualifier preserves the order of all displays on the
pasteboard (same as /NOPUSH).