Aston Martin DB11 Owner's Handbook Manual page 142

Climate Options
6.8
Climate Control
[1] SYNC.:
Select to synchronize the left and right climate zones. Only one
setting dial will be shown when climate conditions are being set.
If SYNC is set to OFF, push the CONTROL DIAL left or right to
select which zone to adjust.
[2] CLIMATE CTRL ON:
Press ENTER to set the climate control to ON or OFF.
[3] A/C:
Press ENTER to set the air conditioning to ON or OFF.
[4] BACK:
Return to the main menu screen.