How do I undo in RawTherapee?

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#1

I can see, that RawTherapee creates kind of a history of edits, but how do I undo a step back?

#2

Just click on the last step in the history you want to keep and continue editing from there. All previously following steps will then be replaced by your new action.

#3

Or use Ctrl+Z to go back in the history stack, Shift+Ctrl+Z to go forward.