Hello, try this procedure for the new keyboard shortcuts of AA8 SP2, using the numeric keypad:
1) Open a big image.
2) Press 5 on the numeric keypad to maximize.
3) Press * on the numeric keypad for the automatic zoom
3b) Press F11 if you prefer a black border, then F11 again to disable.
4) Open other 2-3 images.
5) Press HOME/END to change the active image.
6) Press / on the numeric keypad for a fullscreen preview, then / again to exit.
7) Press 5 again to return to cascade mode.
Step (5) can be done also with the keys "1" and "2" of the main keyboard, using the left hand.
Clear skies, Fabio.