Bottom of Impress slide is hidden from view

Hello

Im looking at a document where the slides are in portret view.

This is in the editor not in a presentation.

For all the slides the lower part goes way down and is hidden from view even though there is plenty of space above the slide and ive scrolled down all the way.

I can sort of get around this by zooming out a lot but then the writing on the slide becomes barely visible.