Pentax OPTIO WS80 Operating Manual page 30

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Available operations during playback
Zoom button towards the Increases the volume.
right (,) )
Zoom button towards the Reduces the volume.
left ( ,_,_,_ )
Four-way controller (•) Pauses playback.
Four-way controller ( _1) (if there are no recorded indexes) Fast-reverses
playback.
(If there are recorded indexes) Plays back starting
from the previous index.
Four-way controller ( I_ ) (if there are no recorded indexes) Fast-forwards
playback.
(If there are recorded indexes) Plays back starting
from the next index.
Available operations while playback is paused
Four-way controller (•) Resumes playback.
Four-way controller ( _1) Rewinds approx. 5 seconds.
Four-way controller ( I_ ) Advances approx. 5 seconds.
Press the four-way controller (v).
Playback stops.
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