Grease Pencil addon reset canvas rotation shortcut?

Hi guys, there is an addon bundled with Blender called “Grease pencil tools”

It has a shortcut that enables you to rotate canvas or “roll camera” there doesn’t seem to be a reset shortcut for it though. Going back to object mode, selecting the camera, and resetting the values in transform (N Panel) manually, seems to be the only way to reset.

anyone have in insight?