The Undo and Redo buttons at the top of the FabFilter One interface enable you to
easily undo changes you made to the plug-in.
The Undo button at the left will undo the last change. Every change to
the plug-in (such as dragging a knob or selecting a new preset) creates a new state in the
undo history. The Undo button steps back through the history to restore the previous states
of the plug-in.
The Redo button cancels the last undo command. It steps forward through
the history until you are back at the most recent plug-in state.
Notes
If the plug-in parameters are changed without using the plug-in interface, for example with
MIDI or automation, no new undo states are recorded.
The Undo and Redo buttons will disable themselves if there is nothing to undo or redo.