Move back in time with your edits, by selecting the latest event you want to restore.
Double-clicking an event allows you to rename it.
Similar events happening in a short time frame are merged automatically. This can be tweaked in the System Preferences.
Clicking the previous action or the 
Undo button is equivalent to clicking › or pressing Ctrl+Z (Windows) Cmd+Z (macOS)
Clicking the next action or the 
Redo button is equivalent to clicking › or pressing Ctrl+Y (Windows) Cmd+Shift+Z (macOS)
The 
Duplicate Project button is equivalent to clicking › . See Project Management.
The 
Delete Current State button will undo the current action, remove it and any action after it.
