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Use the Undo and Redo options in the Edit toolbar to undo changes in your Flow or redo any action.
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Clear your Flow
Remove all the units and links from your Flow by clicking the Delete option in the Edit toolbar.
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Use the Undo and Redo options in the Edit toolbar to undo changes in your Flow or redo any action.
...
Remove all the units and links from your Flow by clicking the Delete option in the Edit toolbar.
...