Composition mode stuck in Full Screen

For some reason, recently when I open Composition Mode it automatically reverts to Full Screen and there is no way I can see to get it back to the proper size and show the toolbars at the bottom of the page.

I recently upgraded to Mac OS 12.01 and regret it very much - it has slowed everything down - is this another item to add to the charge sheet or is there a way around it that I an missing?

Thanks.

At my Mac, I reach for the tool/menu bars with my cursor, and they pop up.

That worked - many thanks Bob.