Excalerate JOSM

Which keys will accelerate JOSM in edit mode and the next question is how to undo that mode ?
Mine is crazy but I don’t know why or what made it into that mode.

Maybe you mean Viewport Following ? Ctrl+Shift+F

The program moves the pointer the distance between the last 2 nodes, nice by drawing ways, but unpleasant when drawing buildings and other details.

Hi GerdP,
I solved it, logically by reinstalling JOSM, after removing all JOSM data from the memory of the PC.
Thanks & Best Wishes

Does that mean that disabling “Viewport Following” did not help? Your description seems to match this mode.