Undo and Redo Your Actions on the Gantt Chart
You can undo up to the last 30 actions you've taken on the Gantt chart (i.e., creating a dependency or rescheduling a task).
You can undo your actions if:
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Your workspace hasn't been refreshed.
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You haven't switched to a different folder, project, or space.
To undo:
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Click the undo button 1 in the Gantt chart's upper right-hand corner. If the button is grayed out, that means there are no actions available to undo.
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Alternatively, use keyboard shortcuts to undo your actions: Ctrl+Z (on Windows) or Cmd+Z (on Mac).
Note
When you make changes, task followers and assignees may receive Inbox and email notifications. When you undo your action, it's considered a separate change and may trigger another notification.
To redo the canceled action:
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Click the redo button 2 in the Gantt chart's upper right-hand corner. If the button is grayed out, that means there are no actions available to redo.
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Alternatively, use keyboard shortcuts to redo the canceled action: Shift+Ctrl+Z (on Windows) or Shift+Cmd+Z (on Mac).
Note
Buttons are active until you switch to another view or refresh the page.