I may add:
In the Sketcher, a press of the joystick should switch between eraser and stylus. It currently appears not to be bound and switching to the eraser is needed in a more convenient fashion.
And, as this as basically been ignored in the thread where I posted it, I wish the reader controls were streamlined and more consistent. Currently, most options are non-orthogonal which makes it difficult to achieve what you actually want. In particular, auto-crop (=hide margins) should make each individual page behave exactly as if it did not have said margins.
https://www.mobileread.com/forums/sho...&postcount=960
Also, the Sketcher discards all changes (everything gets lost), when the device goes into power-safe. That musn't happen.