You can undo a camera move in 3ds Max using the following methods:
- Click the Undo button: Locate and click the Undo button on the Main toolbar.
- Use the keyboard shortcut: Press Ctrl+Z.
Important Note: This method (Ctrl+Z and the Undo button) applies specifically to camera viewports. This behavior is different from that of orthographic viewports, which require using the Views menu > Undo, or the shortcut Shift+Z.
In summary, to undo a camera movement specifically, using Ctrl+Z or the Undo button on the main toolbar are the most straightforward methods. Remember that Undo/Redo functions are also available under the "Edit" menu.