Choose a slideshow app or video editor
Gather the photos you want to use
Select a music track
Import the photos into the project
Arrange the photos in the desired order
Set the duration for each photo
Add transitions between photos
Add the music track to the timeline
Trim the music to match the slideshow length
Adjust photo timing to fit the music
Preview the slideshow
Make any final edits
Export the slideshow as a video file
Save or share the finished slideshow