Undo/Redo

Edit menu > Undo or Redo

Main toolbar > Undo or Redo

Keyboard > Ctrl+Z (Undo) or Ctrl+Y (Redo)

The Undo command reverses the last operation performed on any selected objects. Redo reverses the last operation performed by the Undo command.

Some actions cannot be undone: for example, applying the Collapse utility or Reset Transform utility, or saving a file, which overwrites the previous version. When you know something cannot be undone, use Hold first. Then if you want to undo it, use Fetch. Hold and Fetch are also commands on the Edit menu.

Afer you perform an action that is undoable, the Edit menu shows the name of the function to be undone. After you undo an action, the Edit menu shows the name of the function you can redo.

Undo and Redo are also available as buttons on the main toolbar. You can right-click the Undo or Redo button to display a box that lists the last operations performed. You can highlight and reverse any number of these operations in sequence with the respective Undo or Redo command. By default, there are 20 levels of Undo. You can change the number of levels with the Customize > Preferences > General tab > Scene Undo group.

Undo/Redo and Object Creation

When you create an object, the Create operation is recorded by Autodesk VIZ and displayed next to the activated Undo command in the Edit menu. When you undo the Create operation, the Redo Create operation is displayed next to the activated Redo command in the Edit menu. The Undo and Redo commands in the Edit menu are unavailable when no valid operation was performed or recorded.

Procedures

To undo the most recent action:

Click Undo, choose Edit menu > Undo, or press Ctrl+Z.

To undo several actions:

Right-click Undo.
From the list, select the level where you want to return. You must choose a continuous selection; you can’t skip over items in the list.
Click the Undo button.

To exit the list without performing an action, click the Cancel button, or click somewhere outside of the list.

To redo an action, do one of the following:

Click Redo.
Edit menu > Redo.
Press Ctrl+Y.

To redo several actions:

Right-click Redo.
From the list, click the action to return to.

Your selection must be continuous: you can't skip over any items in the list.
Click the Redo button.

To exit the list without performing an action, click the Cancel button or click somewhere outside of the list.