How to Customise the Action Button on Apple Watch Ultra for Workouts, Waypoints, and Shortcuts

The Apple Watch Ultra lineup introduces specialized hardware engineered for endurance athletes, outdoor adventurers, and technical divers. While traditional Apple Watch hardware relies exclusively on the Digital Crown and side button for navigation, the Apple Watch Ultra features an additional, tactile physical control on the left side of the aerospace-grade titanium case: the Action Button. Cast in high-visibility international orange, this customizable button provides instant, glove-friendly hardware actuation even in freezing rain, underwater depths, or during high-intensity trail runs. Rather than navigating through multi-touch screen menus with wet fingers, users can program the Action Button to launch specific workout sessions, mark custom compass waypoints, trigger dive logs, or execute complex multi-step automated Shortcuts. Understanding how to configure primary and secondary actions ensures your Apple Watch Ultra is optimized for your operational environment.

Understanding Action Button Functionality and Gestures

The Action Button operates through two distinct physical interaction paradigms:

• Single Press: Instantly executes the assigned primary app, workout, or automated script. When executing an active workout, pressing the Action Button again can trigger secondary actions (such as logging a lap interval, advancing to the next segment in a custom workout, or switching disciplines in a multisport race).
• Press and Hold: Activates the Apple Watch Ultra emergency siren. Holding the Action Button for several seconds begins a countdown timer that sounds an 86-decibel acoustic distress pattern audible up to 180 metres away.
• Simultaneous Press (Action Button + Side Button): Pauses an active workout session instantly, eliminating the need to swipe the display screen.

Configuring the Action Button Directly on Apple Watch Ultra

You can configure and remap the Action Button directly on the watch without requiring your paired iPhone.

1. Press the Digital Crown on your Apple Watch Ultra to open the Home Screen.
2. Tap the Settings app (gear icon).
3. Scroll down and tap Action Button.
4. Tap Action to view the primary assignment options:
   • Workout: Launches Apple’s native Workout app or opens a specific workout routine.
   • Stopwatch: Launches the high-precision stopwatch or begins recording split times.
   • Waypoint: Instantly drops a geographic Compass Waypoint at your current GPS coordinates.
   • Backtrack: Activates the Compass Backtrack tracking trail to record your footsteps.
   • Dive: Opens the Oceanic+ or native Depth app to record water temperature and sub-surface metrics.
   • Flashlight: Turns the display into a high-lumen white or red tactical flashlight.
   • Shortcut: Executes a custom iOS/watchOS automation script.
5. Select your preferred primary category (e.g. Workout).

Fine-Tuning App-Specific First and Second Press Actions

Once a primary category is selected, you can configure granular sub-actions to avoid intermediate menu selections.

1. In Settings > Action Button, tap the left arrow to return to the main Action Button menu.
2. Under the App section, tap Workout.
3. Tap First Press. Choose whether pressing the button opens the generic workout list, or select Start a workout to initiate an immediate session.
4. Select the exact discipline (e.g. Outdoor Run) and specific goal type (e.g. Open, Distance, or a custom Pacer route).
5. Return to the Action Button menu and locate First Press and Subsequent Presses:
   • For running workouts, set subsequent presses to Mark a Segment to track manual splits without looking at the watch face.
   • For multisport or triathlon workouts, set subsequent presses to transition to the next leg of the race.

Configuring the Action Button via the iPhone Watch App

For easier visual management and detailed Shortcut selection, configure the button using your iPhone.

1. Open the Watch app on your paired iPhone.
2. In the My Watch tab, tap Action Button.
3. Select your desired category from the Action list.
4. To link a custom automation, tap Shortcut, then tap Shortcut under the App section to select any watchOS-compatible workflow built inside the Apple Shortcuts app.
5. Verify the Siren toggle switch at the bottom of the screen. Keep this enabled for outdoor backcountry exploration, or disable it if you wish to prevent accidental siren triggers during intense sporting events.

Programming Advanced Multi-Context Shortcuts for the Action Button

By pairing the Action Button with Apple Shortcuts, you can program context-aware intelligence. For example, author a Shortcut named Smart Action that evaluates your current state:

• If your Apple Watch Ultra is connected to a heart-rate strap, the Shortcut initiates an Outdoor Cycling workout.
• If your current time is past 10:00 PM, the Shortcut toggles the Night Mode red flashlight on.
• If you are connected to your office Wi-Fi, the Shortcut dictates a quick note to Apple Notes.

Assigning this single master Shortcut to the Action Button transforms the physical button into an intelligent, adaptive hardware interface tailored to your lifestyle.

Customising the Action Button empowers Apple Watch Ultra users to execute mission-critical tools instantly, maximizing hardware utility across challenging outdoor and athletic environments.