FabFilter Simplon Help
The Undo and Redo buttons at the top of the FabFilter Simplon 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.
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