Newbie question about rectangular marquee tool

[towelhead]

When I use Adobe Photoshop, I can easily cut or copy part of the picture with the rectangular marquee tool and Ctrl+X or Ctrl+C command. A few seconds later I copy it into another picture with the Ctrl+V command. When I try to do it in Affinity Photo, marquee rectangle is displayed, but nothing is selected. I looked into manuals, but they provide no clues why the Affinity Photo rectangular marquee tool does not work.

I have found the answer - Copy Flattened = Ctrl+Shift+C. (I do not know how to delete this thread.)

[v_kyr]

Make sure the corresponding image layer is selected in the layers panel (blue highlighted) when performing cut/copy/paste operations with the selection tools.