Yamaha PM1D Supplementary Manual page 19

If the OFFSET LOCK button is off for a channel that
is channel-copied, the offset value will also be copied.
When the power of the CS1D is turned off, and
then on once again, the ENABLE button of the
TRACKING RECALL area will be turned off for the
sake of safety, disabling the Tracking Recall func-
tion.
Tracking Recall function
19