Hi Jim,
One thing that you might get in the habit of doing (when you render) is
setting 'Accumulate' . I find it very nice to be able to look at the history
of renderings.
As as side benefit, once the second image is saved, you get the buttons
for Display, Save, Montage, etc. The Display ("Disp") button is for the
menu you are asking about. The shift-right-click keystroke is just a
short-cut that Bob added to that type of AFNI display window (like the
Axia Image window, for example). The "natural" way to get at that menu
is via accumulate.
Does that sound reasonable?
- rick