2. Click the "Insert" command in the menu bar and find "Movies in Files" next to "Movies and Sounds" in the drop-down list.

3. Find the movie you want to add, and then click OK.

4. At this point, the prompt "How do you want to start the movie during the slide show?" , according to your own needs, choose "automatic" here.

5. Click Insert Movie, right-click and select Edit Movie Object from the list.

6. In the pop-up dialog box, check "Zoom to Full Screen" under "Display Options" and click "OK".

7. When slides are shown in this way, they will be played in full screen.