.. meta:: :description: Overview of the undo history docker. .. metadata-placeholder :authors: - Wolthera van Hövell tot Westerflier - Raghavendra Kamath - Scott Petrovic :license: GNU free documentation license 1.3 or later. .. index:: Undo, Redo, History .. _undo_history: ============ Undo History ============ .. image:: /images/dockers/Krita_Undo_History_Docker.png This docker allows you to quickly shift between undo states, and even go back in time far more quickly than rapidly reusing the :kbd:`Ctrl + Z` shortcut. .. index:: Cumulate Undo Cumulative Undo --------------- Click on the settings icon at the bottom of the Undo History docker. It will show you a dialog box to enable cumulative undo. You can change these parameters: Start merging time The amount of seconds required to consider a group of strokes to be worth one undo step. Group time According to this parameter -- groups are made. Every stroke is put into the same group until two consecutive strokes have a time gap of more than T seconds. Then a new group is started. Split strokes. A user may want to keep the ability of Undoing/Redoing his/her last N strokes. Once N is crossed -- the earlier strokes are merged into the group's first stroke.