Yank
Bulbous Also Tapered
Post #845 in the 2023 F1 thread:
In the DRS Activation Zone, if the driver is allowed to use DRS (not first 2 laps of race, not a wet race, not within 1 second of car in front etc.), then the driver needs to press the DRS button to engage it. To disengage DRS the driver can press the DRS button again, but it is easier to disengage DRS by coming off the throttle or hitting the brake pedal to enter a corner.
I think the question was whether the driver has to know exactly where the DRS zone begins and ends? What happens if a driver presses the button outside of a DRS zone?