I have to see this.
one hand to the arrow keys, the other to the mouse, lift the mouse, maybe turn your hand to the side and lay it down again
yes but after changing the layer in any way by clicking into the layers window you can't move the mouse with the arrow keys anymor until you click at the drawing area
my mouse is quite precise and other hardware wouldn't help because I'm not drawing pictures in any way (I can't draw) I'm constructing them due using the coordinates and to do it without the aroow keys I'd need to turn the mouse speed to minimum and thats quite annoying since I don't know shortkeys for changing the mouse speed in windows because while not constructing images I need a very high mouse speed. I could use the dpi-settings of my mouse to slow it down but that would make my mouse unprecise...