The worst part is that it used to allow panning outside the canvas. At some point, they broke it in fullscreen (or non-fullscreen, I don't remember). Then they broke it in the other mode. They also removed the option to hide all windows with the tab key, which was extremely useful when working on a small screen. And they also moved all their color filters into another large window you have to open, obscuring your canvas. It's clear that they develop this app on a massive screen, and give no thoughts to the people who might want to use it on a 13'' MacBook.