1. Suppose we want to remove "beyond ourselves" from the master, click View in the menu bar and select the slide master;

2. After entering the slide master, you can edit the slide master. Click to select "Beyond Self";

3. Right-click the selected "Beyond Self" text box and click Cut, or click Delete directly to delete it. The deleted masters are as follows:

4. Click the button to close the slide master, and then directly return to slide mode to do other operations (the right side of the slide has been removed at this time).