Zoom H4n Pro Operation Manual page 56

You can select from two recording modes.
1
The selected
TRACK lights
2
Lit
055
Input setting ... P.054
Recording functions ... P.057–
MTR
mode top
Shows input level
Counter will not reset to 0.
3
Lit
4
Unlit
Counter does not reset to 0.
PAUSE button to listen to what you have just recorded.