Sony PMC-R30L Operating Instructions Manual page 17

To cancel Program Play
Press MODE until "PGM" disappears from the
display.
To check the order of tracks before play
Press DSPL ENT MEM on the player.
Every time you press the button, the track number
appears in the programed order.
To change the current program
Press p once if the CD is stopped and twice if the CD
is playing. The current program will be erased. Then
create a new program following the programing
procedure.
17 GB
The CD Player