Where to add docstring/comments to repo for graphics.DrawText() and RGBMatrix().CreateFrameCanvas().SetImage()

Not sure if this is the right place for this question.

I struggled with the difference between how coordinates are used for DrawText() vs CreateFrameCanvas() and I’d like to add an explanation somewhere in the repo. I’ve looked around and I don’t think this exists, but I may be missing it.

If this is appropriate for a PR, should I add it to the Python Readme or add docstrings to DrawText() and CreateFrameCanvas() methods in the .pyx files under the Python bindings directory?

Thank you!