1. Use shortcut key: press Ctrl+Alt+Z(Windows) or Cmd+Option+Z(Mac), which is the default shortcut key to return to the previous step. Every time you press it, you will return to the previous step, and repeatedly press it to return to the desired step.
2. Use the History Panel: In the toolbar on the right side of AE interface, you can find the "History" panel. After expanding the panel, you can see a list of each step. Select the step to return to, and then click the step to return to the step.
3. Undo multiple steps: If you return to multiple steps and only want to return to the previous step, you can try to hold down the key combination of Ctrl+Z(Windows) or Cmd+Z(Mac) for several times until you return to the required step.