Nikon 1 J5 Reference Manual page 160

Adjust display times and audio settings.
2
Adjust the following options:
Frame interval Choose how long each still image is displayed.
Movie playback
time
Audio
Select Start.
3
Highlight Start and press J to start
the slide show.
I
A
Viewing Bursts
Bursts (0 132) may be represented in slide shows by a key frame or
each image in the burst can be played back individually. To view only
the key frame, select Key picture only for Sequence display options
in the playback menu (0 152). To view each image individually, select
Individual pictures.
138
Choose how much of each movie is played back
before the next slide is displayed. Choose Same as
frame interval to display the next slide after the
time selected for Frame interval, No limit to play
back the entire movie before displaying the next
slide.
Mute audio playback, or select Movie sound tracks
to play audio recorded with movies and with Motion
Snapshots recorded with Ambient selected for
Audio (0 92). No sound is played for still images.