Stepping back a change
Undo takes back your most recent change. You can:
- Press Cmd+Z on a Mac, or Ctrl+Z on Windows and Linux.
- Click the undo button, which lives in the controls at the bottom-right and at the top of the Activity Panel.
A whole drag counts as a single step, so one undo takes you all the way back to before you started dragging.
Undo is personal
Undo steps back the changes that you made. Each person editing the diagram has their own short undo history of their last few steps, so undoing never reaches into someone else's work.
Your quick undo history is just for the current session and is cleared when you reload the page. The saved Activity history itself stays put.
What other people see
When you undo, the matching line disappears from the Activity Panel for everyone, keeping the record honest.
Undo is not available to people who are only viewing the diagram.
When you have gone back too far, use Redo to put a change back.
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