Hi guys, I hope I can find some time to ask your questions
Hot key for rotate canvas is ALT+SPACE
And other importand hotkeys is:
ALT+CTRL - Fast pick second color
SPACE+CTRL - Fast smooth zoom tool
ALT+SHIFT - Pick area color for bristle brush (each villus takes its own color from canvas)
F - Loads the main color of the brush while drawing
SPACE+ALT - Fast rotate canvas tool
SPACE+SHIFT - Fast preview (temporarily hides the panels and centralizes canvas)
SPACE+A - Fast layer selection tool
CTRL(on pannels) - Fast controler disable (hold CTRL and click on on the desired option)
Q - Swap tablet from region to fullscreen (for example, if you have small tablet you are likely to use a small area as in the picture below... This hotkey switches to fullscreen and back)