Pasting screen grab on iPad Freeform reduces image size

I am taking screen grabs (Shift + Command + 3) of my iPad screen and pasting it into a Freeform board (for further annotation). The pasted images are tiny (about a third of their original size). Of course, I can scale them up, but I’m wondering if there’s a reason why they’re coming in tiny in the first place. Screen grabs are normal size (i.e., as big as my screen) when pasted into other apps (e.g., Preview).