Disappearing Square

For the last two days I have trawled videos looking for the answer, I know it can be done I saw it in a video but now can’t find it. Could someone please help, tearing my hair out now. I am trying to put a design inside a square so I can centre it, I get the square in my workspace ok, but as soon as I put the design in the square, the square disappears. I’ve run out of buttons to push.

Could you please send a screenshot and specify what “design” means ( ) a picture ( ) a group of forms …

Maybe you need to move the square to last position in cut/layers window.
Check if the info here helps;