How to extend the sound to the slides below the ppt

1. Insert a sound first: click "Insert"-"Film and Sound"-"file sound", locate the sound file on the computer, and then insert it, the playback control can be set to "automatic playback" or "play when clicked". The speaker icon appears on the slide.

2. Find the timing effect: Right-click the horn icon, select "Custom Animation", and right-click the sound file in the "Custom Animation" panel on the right, right-click "timing" and click "effect.

3. Set delayed playback: Hook the "After [] slides" under "stop playing" and click "OK. Click the "wine glass" icon in the lower left corner to play the current slide, test whether the effect is achieved, and save the file.