Apple Watch Ultra features a customizable Action button on the left side of the case that is capable of performing a variety of functions. This article explains what it can do, and how you can configure it.

Apple Watch Ultra Orange Alpine Loop Action button 220907 big
Apart from activating the Siren, the Action Button on Apple Watch Ultra can be customized to perform a number of functions, offering quick access to them without you having to tap through various screens.

When you first set up your Apple Watch Ultra, you'll be invited to assign one of the following functions to it:

  • Workout
  • Stopwatch
  • Waypoint
  • Backtrack
  • Dive
  • Flashlight
  • Shortcut
  • None

You can customize your selection further, depending on the app or function chosen. If you chose the Workout app, for example, pressing the Action button once will open the Workout app, but you can also assign the "First Press" function within the app to start a specific workout.

action button mark segment
But that's not all. When you've started the activity, you can then press again to perform a secondary function, such as marking segments or laps in a track workout, or switching from cycling to running in a triathlon. Again though, what function this is will depend on the current activity.

How to Map Functions to the Action Button

Once your Apple Watch Ultra is set up, you can re-assign functions to the Action button via a new menu right on your wrist, like so.

  1. On Apple Watch Ultra, launch the Settings app.
  2. Scroll down and tap Action Button.
  3. Tap the menu under "Action" and select one of the following options: Workout, Stopwatch, Waypoint, Backtrack, Dive, Flashlight, and Shortcut.
    settings

  4. Tap the arrow in the left-hand corner to go back to Action Button settings.
  5. Tap the menu under "App" if it appears, then select an app to perform the action. Some actions, such as Flashlight, don't show the App option.
  6. Tap the arrow to go back.
  7. Tap the menu under "First Press" if it appears, then select an action. Some features allow different actions to happen on the first and second press of the button.

Tips appear on the screen under "Gestures" explaining how the Action button works with the settings that you've assigned to it. For example, tips for an outdoor walk show you that pressing the Action button once starts a workout, and pressing the Action button and the side button at the same time pauses the workout.

Configuring the Action Button via iPhone

You can also use the iOS Watch app to configure what the Action button on the Apple Watch Ultra does.

  1. Launch the Watch app on your iPhone.
  2. Tap the My Watch tab if it's not already selected.
  3. Tap Action Button.
  4. Under "Action," tap the currently selected action to change it.
  5. Select from one of the following options: Workout, Stopwatch, Waypoint, Backtrack, Dive, Flashlight, and Shortcut.
  6. Tap Action Button to go back to the previous menu.
  7. Tap the menu under "App" if it appears, then select an app to perform the action. Some actions, such as Flashlight, don't show the App option.
  8. Tap the arrow to go back.
  9. Tap the menu under "First Press" if it appears, then select an action. Some features allow different actions to happen on the first and second press of the button.

settings

Note that tips on the screen under "Gestures" explaining how the Action button works with the settings that you've assigned to it.

Note that if you want to pause the current action, you can press and hold both the Action and Side buttons at the same time. Try to avoid pressing the Side button or the Digital Crown accidentally when you press the Action button. Your Apple Watch will do whatever is assigned to the Action button if you happen to press another button at the same time, unless a button combination is configured.

Related Roundup: Apple Watch Ultra 3
Related Forum: Apple Watch

Top Rated Comments

Stiksi Avatar
41 months ago
This is certainly not ”extremely customizable” like it has been described over and over. ”Somewhat customizable” is more like it. If Apple would just get over itself and actually give us a Shortcuts system that is extensive and deeply integrated, that would make it a whole different thing but this is just typical Apple: it does exactly what was shown in the keynote and maybe a couple other things but that’s it. I mean it’s nice to have but if you’re going to add a whole extra button, maybe make it count a bit more.
Score: 5 Votes (Like | Disagree)
beanbaguk Avatar
41 months ago
I'm sorry. I can't get over this. As I've said before; Only Apple could successfully reinvent a button as a major feature! ?
Score: 3 Votes (Like | Disagree)
disquieted Avatar
41 months ago
I own one and love it. It was rugged enough to handle my lifestyle which includes walking the dog around the block twice a day and making my morning nitro cold brew in the kitchen...after 3 1/2 days, it still is holding up very well.
Score: 3 Votes (Like | Disagree)
ProfessionalFan Avatar
41 months ago

I'm sorry. I can't get over this. As I've said before; Only Apple could successfully reinvent a button as a major feature! ?
That's a take.

If they didn't add this new (useful) action button, people would be saying it is the same watch. Some would find something to complain about no matter what.
Score: 1 Votes (Like | Disagree)

Popular Stories

Apple Logo Spotlight

Report: Apple to Launch These New Products in 2026

Sunday November 2, 2025 5:34 am PST by
Apple is planning to launch at least 15 new products in 2026, according to Bloomberg's Mark Gurman. Gurman outlined what to expect from Apple in 2026 in the latest edition of his "Power On" newsletter. He said the company is heading "into one of its most pivotal years in recent memory," with the rollout of major new Apple Intelligence features, intense regulatory pressure on the App Store,...
ios 26 1 slide to stop

iOS 26.1 Brings Back 2007 Feature in New Way

Friday October 31, 2025 1:40 pm PDT by
The upcoming iOS 26.1 update includes a small but helpful change for iPhones, and it could prevent you from running late to something important. Specifically, when an alarm goes off in the Clock app, there is a new "slide to stop" control on the screen for turning off the alarm. On previous iOS 26 versions, there is simply a large "stop" button, which could be accidentally tapped. The new ...
Apple Intelligence General Feature 2

New Version of Siri to 'Lean' on Google Gemini

Sunday November 2, 2025 6:06 am PST by
In his "Power On" newsletter, Bloomberg's Mark Gurman today provided an update on the status of Apple Intelligence and the plans for it in 2026. Apple is still planning to roll out its revamped version of Siri around March of next year. The release should be accompanied by the release of a new smart home display product with speaker-base and wall-mount options. A new Apple TV and HomePod...
HomePod mini and Apple TV

New Apple TV and HomePod Mini Likely Launching Soon

Sunday November 2, 2025 5:49 am PST by
A new Apple TV and HomePod mini could launch as soon as this month, Bloomberg's Mark Gurman today suggested. In today's "Power On" newsletter, Gurman said that Apple retail stores are planning an overnight refresh on the evening of November 11, where changes will be made after closing, such as refreshing displays and placing new products for the following day. The timing of the overnight...
iOS 26

Apple Releases iOS 26.1 With Liquid Glass Toggle, Slide to Stop Alarm, New Apple Intelligence Languages and More

Monday November 3, 2025 1:11 pm PST by
Apple today released iOS 26.1, the first major update to the iOS 26 operating system that came out in September, iOS 26.1 comes over a month after iOS 26 launched. ‌iOS 26‌.1 is compatible with the ‌iPhone‌ 11 series and later, as well as the second-generation ‌iPhone‌ SE. The new software can be downloaded on eligible iPhones over-the-air by going to Settings > General >...
Apple Foldable Thumb

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Friday October 31, 2025 8:52 am PDT by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Below, we've collated an updated set of key details that have been leaked about Apple's foldable iPhone so far. Ove...
Early Black Friday Deals 2

The Best Early Black Friday Apple Deals

Sunday November 2, 2025 10:04 am PST by
We're officially in the month of Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When ...
M5 MacBook Pro

Waiting for New Macs? Apple Just Shared Bad News

Friday October 31, 2025 7:32 am PDT by
Apple has just given a strong indication that it will not be releasing any additional new Macs for the remainder of the year. Apple's CFO Kevan Parekh dropped the hint during the company's earnings call on Thursday:On Mac, keep in mind, we expect to face a very difficult compare against the M4 MacBook Pro, Mac mini, and iMac launches in the year-ago quarter.Parekh essentially gave a heads up ...