Option to invert Shift+MMB and MMB quickly (as default for grease pencil scenes)

When working with grease pencil, it is quite annoying when I accidentally use the mmb and rotate out of the camera view, as I am used to using mmb to pan 2d editors. Furthermore, when working with my wacom pad, I have to set my button to a keybinding. I know that the 3d world is still used in GP scenes, but it would be nice to have a quick way to invert panning and orbiting without having to go to edit my keymap every time.