Photoshop - create a paste special template

Hi all.

a few years ago I downloaded a sports template with two square "permanent" areas that I could paste photos into, and don't have that template. 

THATS fine.....but how do I create one??

essentially it's an area (say a square) that hats saved on the template/file and I can paste into that selection. AND the photo pasted goes into that selection only.  I've googled a bit and found something where I can save a selection? That

sounds like it might work

I'm using v26.x

all help is appreciated.