KORG PA4X 76 - Manual (Page 184)

180| Customizing and editing the Sound sets
Setting Portamento
Portamento is a smooth sliding transition from a note to the following one.
▪ Select the Portamento checkbox to turn portamento on, or uncheck it to
turn it off.
▪ Use the Portamento > Time knob to adjust the speed of portamento.
Resetting a track
▪ Touch the Reset Track button to reset all changes to the selected track.
Resetting all tracks
▪ Touch the Reset Family button to reset all edited values.