Honda ODYSSEY 2019 Owner's Manual page 212

uuAdjusting the SeatsuFront Seats
Lumbar
Support
Adjustment
Switch
* Not available on all models
210
■
Lumbar Support Adjustment Switch
Press the top: To move the lumbar support
up.
Press the bottom: To move the lumbar
support down.
Press the front: To increase the entire
lumbar support.
Press the rear: To decrease the entire lumbar
support.
*