What is the procedure to synchronize the background music with the slideshow?
1. Click Settings in the upper-right corner of the software.
2. Click on the Slideshow tab and tick the checkbox before “Set photos and video’s time as slideshow’s play. Repeat or trim background music if necessary to fit the time.”
3. Click on OK to save the changes.
Note: This option is only available for the music you add, and not for pre-loaded audio.