You can also convert a slideshow to a track, allowing you to add additional audio streams
and subtitles to it.
A slideshow can contain up to 99 still images. Each still can have its own display duration,
or the viewer can control when to go to the next still. You can add audio to each slide
and let each audio file’s duration determine the slide’s display duration. Alternatively,
you can assign one or more audio files to the overall slideshow, with each slide’s duration
scaled so the whole slideshow fits the duration of the audio files. You can also assign
transitions to each slide, adding effects such as dissolves and wipes as you play the