Yamaha DTR2 Owner's Manual page 24

To program desired tunes (APMS=Automatic Programmable Music Selector)
You can program desired tunes in any desired order.
If the tunes are not numbered properly, the desired tunes may not be programmed, or program playback may stop
suddenly.
1 Load the tape.
2 Press the PROGRAM button.
The APMS indicator lights.
3 Using the digit buttons (1-0, +10, +20), enter the
desired tune numbers in the desired order.
Example:
To select tune 12:
Press "+10" and "2".
To select tune 20:
Press "+20" and "0".
To select tune 54:
Press "+20" twice, "+10" and "4".
The display shows the program number (playback
order) and the programmed tune number.
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4 Press the PLAY button
The programmed tunes are played in the programmed
order.
To skip to the beginning of a tune in the program:
Press the FF or REW
beginning of previous/subsequent programmed tunes.
To check the program contents
In stop mode, press the CALL button.
The programmed tunes are displayed in programmed
order.
When the CALL button is pressed during program
playback, the next programmed tune number to be
played is displayed for about one second.
To erase a programmed tune
Press the STOP button
Each time the CLEAR button is pressed, one programmed
tune will be erased beginning with the last programmed
tune.
To clear the whole program
Press the PROGRAM button in stop mode. Also, pressing
the OPEN/CLOSE button or turning off the power clears the
whole program.
button to skip to the
then the CLEAR button.