add Clear all keyboard shortcut, will be perfect. I love it as far!

Really good addon - almost perfect! That you can't draw over PDFs is inconvenient. (Is there a solution to this?) A text typing option would be nice. It would be better too if it scrolled with the page. But thanks anyway, I use it a lot in classes.

doesn't work on PDFs.
But I still think it could be useful for other people.