As given in the url How to Copy Contents of One Canvas to Another Canvas Locally, I've found that it is possible to capture the data from one canvas to another, but have been searching for a solution to only do this between specific coordinates on the canvas (canvas coord info: https://www.w3schools.com/graphics/canvas_coordinates.asp).
I would appreciate any help given on this; so far I have found no explanation of link for how to do this, and don't know even where to start.
