Yamaha CDC-645 Owner's Manual page 9

Selecting time displays
You can select any of the four time displays by pressing the TIME display mode-select button.
Elapsed time of the track now playing
Remaining time of the track now playing
Note
The remaining time will not be displayed for track number
21 or higher.
When you listen with headphones
Connect the headphones to the PHONES jack and adjust the volume by using the OUTPUT LEVEL control. At that time, note
that this adjustment will also vary the level of the signal output to the amplifier.
PHONES
OUTPUT LEVEL
DOWN
Total remaining time on the disc
Total disc play time
UP
or
– +
OUTPUT LEVEL
9