Copy, Paste

[neoneye]

"The ability to copy and paste drawings from one canvas to another."

How should the user interface be like?

You could have the option to click a “copy” button, then it puts you in a mode where you draw a shape around what you want to copy, then it gets saved and you can paste it onto the same or other canvases and move it around?

Or possible selection shapes: triangle, square, hexagon?