eRnsT provides access to the complete history of changes that you have made to your scene, so that you can easily undo any number of recent changes and return your scene to an earlier state.

You can undo and redo your changes in several ways:

• By pressing Ctrl-Z to undo the last change, and Ctrl-Y to redo the last change you undid.
• By using the in the toolbar to undo the last change, and the icon to redo the last change you undid.
• By using the Undo History tab in the properties pane. This tab lists the history of all changes that you have made since starting eRnsT. You can return to any point in that history by clicking an entry in the list. Any changes that you have undone are listed in grey, to indicate that they are not currently reflected in the scene but that you can redo them at any time. However, if you return to an earlier point in the change history then make another change, any changes listed in grey are immediately discarded.

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