Aston Martin DB11 Owner's Handbook Manual page 191

Operation
Warning: If roof movement is not complete the message
"Open/close top completely" will be shown in the instrument
cluster.
To operate the roof use the switch (B) in the centre console.
To Lower the Roof: Pull and hold the switch backwards to lower
the roof.
To Raise the Roof: Push and hold the switch forwards to raise the
roof.
Once roof movement is complete, a confirmation sound will be
heard from the instrument cluster.
Window Operation
The windows are operated independently of the roof. Use the
window switch to operate the windows as normal.
Roof Relaxation
The roof system continually monitors the roof position. If the roof
is in a position between fully open and fully closed for 7 minutes
with the ignition on, the roof will close. There will be a warning
sound and the roof will relax and close to it's stowage position in
its lowest position.
If the key is removed from the vehicle ignition, the roof system
will not wait the 7 minutes and will close after the audible
warning.
Warning: The roof can fall rapidly as the roof system loses
hydraulic pressure. Keep away from the roof mechanism
when the audible warning begins, to prevent injury or
entrapment.
11.3
Convertible Roof