## 4.1. Undo and Redo

The undo and redo capability is limited by the amount of available memory.

In stand-alone mode, the undo stack is cleared whenever a New, Open, or Close action occurs. Similarly, when using CFX-Pre/CFD-Post from within ANSYS Workbench, the undo stack is cleared in CFX-Pre/CFD-Post after the application receives commands from ANSYS Workbench.

Issue the Undo command by doing any of the following:

- Select Edit > Undo.

- Click Undo on the toolbar.

- Press Ctrl + Z

Note:

- You can repeatedly issue the Undo command.

- Some viewer manipulations cannot be reverted using the Undo command.

- Some commands that you issue have multiple components. For example, when you create some objects the software creates the object and sets the visibility of the object on (in two separate operations). Thus, when you perform an undo operation in such a situation, you are setting the visibility of the object off; you must choose undo a second time to “uncreate” the object.

- Undo cannot be used when recording session files.

The redo feature is used to do an action that you have just undone using the Undo command. Issue the Redo command by doing any of the following:

- Select Edit > Redo.

- Click Redo on the toolbar.

- Press Ctrl + Y

Release 18.2 - © ANSYS, Inc. All rights reserved.