Olympus m:robe MR-500i Basic Manual page 24

Listening to the music
No. Item
N
REPEAT indicator
O
RANDOM indicator
P
Next track/fast-forward
Q
Add to FAVORITES
R
Volume adjust
S
Highlight
T
Settings
To select the desired track or album
You can search and select the track or album in the "SEARCH" mode.
In the "SEARCH" mode, you can search for a track by a category, such as "PLAYLISTS," "ALBUMS," etc.
You can also narrow down the search using multiple categories.
EN-24
Indicates that "REPEAT" is set to "ONE" or "ALL."
Indicates that "RANDOM" is set to "ON."
Touch to play back the next track; touch and hold to fast-forward.
Touch to add the track displayed at the top of the screen to the
"FAVORITES" list.
Touch to display the volume adjust screen. Touch
up, or touch to turn the volume down. After adjustment, touch outside
the volume adjust screen to return to the previous screen.
Indicates the selected track.
Touch to display the "PLAYBACK SETTINGS" screen, where you can
set "RANDOM" or "REPEAT."
Explanation
to turn the volume