Garmin Edge 540/840 Public Beta 26.12
Garmin is rolling out firmware beta 26.12 for the Edge 840/540 Series

Source Garmin.com
How to Install the Beta
- Enroll in the Beta Program: Ensure you are enrolled in the beta program and have added a Wi-Fi network to your Edge device. More information here.
- Check for Updates:
- Navigate to Main Menu > System > About > Check For Updates.
- If available, select Software Update 26.07 to install it.

Source Garmin.com
Change Log 26.12
- Fixed issues with third-party workouts not syncing to device
- Fixed climb pro lines being too thick as you zoom out on the map
- Fixed intensity minutes glance displaying incorrect values
- Fixed overlapping values on some graphical data fields
- Fixed sizing differences with electronic shifting icons
- Fixed extra small font sizes for units
Change Log 26.11
- Added ability to update Garmin power pedal scale factors with accuracy of 4 decimal places
- Fixed brightness jumping to 60% after being set to 0%
- Added graphical compass data field
- Fixed Garmin Connect Mobile displaying text in a different language
Change Log for Version 26.10
- New Features:
- View future weather conditions for scheduled Garmin Coach Workouts.
- Added camera options to Edge Remote / Di2 Remote Actions.
- Schedule a software installation for after your ride.
- View Garmin Coach running and strength workouts within Edge calendars (supporting wearable required).
- View multiple workouts scheduled on the same day within Edge calendars.
- Added a new map data field.
- Fixes & Improvements:
- Resolved Altimeter calibration menu issues in night mode.
- Centered GroupRide rider list around the user.
- Fixed invalid data in gear details and issues with eBike data fields.
- Added connection type information for paired sensors.
- Resolved issues with nutrition/hydration tracking when the device is power-cycled mid-activity.
- Fixed pauses during the update process before device reboots.
- Added support for HRM 200 pairing and data.
- Addressed various bugs and crashes.
Change Log for Version 26.07
- New Features:
- Same as version 26.10 (features listed above).
- Fixes & Improvements:
- Same as version 26.10 (fixes and improvements listed above).