Not being able to move out of the frame at higher resolution

Hi!

I love Piskel and really like everything about it, I just have this one issue that makes me often choose alternatives when working with higher resolutions. When I want to work on a corner or side, I am not able to drag that part of the image to the center of my screen, because I can't move my "camera" out of the frame borders.

This is really distracting for me, as I'm used to working on paper and being able to move it anywhere. Has anyone else been having this problem?