Hi!
I cannot figure out what is the canvas' position related to. For sure it is not related to display's pixel numbers. And what's more confusing, when I move the canvas around the patch, I get coordinates which are not related to it's parent window. To better understand what I'm talking about, take a look at the attached patch.

Thank you!

http://www.pdpatchrepo.info/hurleur/canvas_position.pd

The upper left corner of a subpatch defaults to (0, 0), but you are allowed to scroll beyond that. That's probably what happened here. To see exactly where (0, 0) is, make the patch a GOP and set the margins to 0.

Perfect!
Thank you very much!