Set "Zoom in/out" and then check the "Rewind after playback" option, the screen will become larger when playing, and the enlarged animation will automatically rewind to its original size after playing. The operation process is as follows:

First of all, the PPT 2007 demonstration is used here. First, click the picture in PPT, enter the "Animation" menu, and click "Custom Animation".

2. Click "Add Effect" in the custom animation pane, click "Emphasize" in the drop-down menu, and click "Zoom in/out" in the submenu.

3. At this point, you can add an enlarged/reduced animation in the custom animation pane. At this time, double-click the animation with the left mouse button to open the zoom-in/zoom-out animation window, enter the Effect panel, and set the size when zooming in.

4. Then enter the "Timing" panel, set the start effect, check "Return quickly after playing", and finally click "OK" to complete the animation setting. The effect is to click on the picture or play it automatically (according to the startup mode set by the timing window). After the picture is enlarged to the specified size, it will directly return to its original size and position.