Undo/Redo

The Undo command reverses the last operation, including selection actions and those performed on selected objects. Redo reverses the last Undo operation.

• Quick Access Toolbar > (Undo) or (Redo)
• Main Toolbar > (Undo) or (Redo)
• Standard menu: Edit menu > Undo or Redo
• Keyboard > +Z (Undo) or +Y (Redo)

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 an action 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 Undo command on the Edit menu shows the name of the function to be undone. After you undo an action, the Redo command Edit menu shows the name of the function you can redo.

Undo and Redo are also available as buttons on the Quick Access toolbar and the main toolbar. On the Quick Access toolbar, you can click the Undo or Redo down-arrow to display a drop-down list that shows the last operations performed. On the main toolbar, right-click the Undo or Redo button to see the list of recent operations. 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 3ds Max and displayed next to the activated Undo command in the Edit menu. If you undo the Create operation, the Create operation appears 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:

Do one of the following:

• Click (Undo) on the Quick Access toolbar.
• When using the Standard menu system, choose Edit menu Undo.
• Press +Z.

To undo several actions:

1. Click the (Undo) drop-down arrow on the Quick Access toolbar.
2. From the list, select the level where you want to return. You must choose a contiguous selection; you can’t skip over items in the list.
3. 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) on the Quick Access toolbar.
• When using the Standard menu system, Edit menu Redo.
• Press +Y.

To redo several actions:

1. Click the (Redo) drop-down arrow on the Quick Access toolbar.
2. From the list, click the action to return to.

   Your selection must be contiguous: you can't skip over any items in the list.

3. Click the Redo button.

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