Sony DCR-TRV39 - Manual (Page 85)

Monitor panel
Displays a preview of the selected thumbnail, though this monitor
does not appear at all when the thumbnail corresponds to a sound
file.
Volume control
Drag the slider to adjust the volume of movie or sound files,
though this slider does not appear at all when the thumbnail
corresponds to a still picture.
Preview ON/OFF Turns the preview display on or off.
Play button
Begins playback, though this button does not appear at all when
the thumbnail corresponds to a still picture.
Play position slider
Pauses movie/sound playback, though this button does not appear
at all when the thumbnail corresponds to a still picture.
Single Frame Rewind
button
Rewinds the movie one frame at a time.
Single Frame Advance
button
Advances the movie one frame at a time.
File Information Display
button
Displays file information relative to the selected file, including file
name, file type, and file location. You can also use fields here to
enter your own title or comments.