To change what the Action button does on Apple Watch Ultra, open the Settings app, tap Action Button, tap Action, then pick a function such as Workout, Backtrack or Dive. The same button sounds the siren: press and hold it, wait for the countdown to finish, and the watch starts an alarm meant to attract…
Action Button
iPhone 18 Pro Buttons Explained: Action Button, Camera Control, Side Button and Volume
The iPhone 18 Pro has four physical controls: Camera Control, the Action button, the side button and the volume buttons. Apple’s pages describe Camera Control in the most detail, call the Action button customizable, and list no changes to the side button or the volume buttons, which keep their existing jobs. Camera Control opens Camera…