Impress: how to move (or to set a shorcut) to next slide in normal view

Hi guys,
I know how to navigate to previous/next slide when is active the “Slide Pane” or the “Navigator Side Bar”; but I want to have a shortcut working to go to previous/next slide when I am in the normal view.

If I try to customize the shortcuts, I do not find the function “NEXT SLIDE” (or “PREVIOUS SLIDE”), but “GO TO NEXT PAGE” (or “GO TO PREVIOUS PAGE”). I have tried to set these shortcuts but they do not work when normal view is active.

This shortcut is crucial when you are working and you simply want a fast way to move to the next slide (without going with the pointer to the side panels).

When I am in the normal view and I use PGUP or PGDOWN (or any combination with CTRL or ALT), I simple move the slide within the “space” of the viewer, that is a behaviour completely useless.

any idea?
many thanks
T