Pentax Optio Optio X Connection Manual page 57

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From the [Snap to] menu, select [Start], [Previous],
[Next], or [End].
Start Begins playback at the
beginning of the timeline.
Previous Begins playback at the
beginning of the previous
movie or image.
Next Begins playback at the
beginning of the next
movie or image.
End Begins playback at the
beginning of the last
movie or image.
Music and other audio on an audio track can be dragged to the
desired starting position.
Synchronizing with movies and images
The playback time of music/audio can be shortened to synchronize with
the length of a movie or image that has the same starting point.
1
Click the right mouse button on an audio track in the
timeline.
2
Select [Trim to slide] from the menu.
The playback time of music/audio
is shortened to synchronize with
the length of the movie or image
that has the same starting point.
Select [Fit to audio] from the [Timeline] menu to synchronize the
length of the entire show with the playback time of music/audio
added to an audio track. This is helpful, when you want to create a
slideshow that is synchronized with a song.
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