Great stuff! I spotted some further info on a Reddit post about what the buttons do - may be useful: https://www.reddit.com/r/Xreal/comments/15tglf7/explanation_of_xreal_air_button_functions/?context=3
I’ve copied and pasted below in case the Reddit post goes away…
Button Functions
Display On/Off Button
- Single click
Activates or deactivates the glasses’ display.
- Long press for about 3 seconds
Converts brightness control buttons into volume control ONLY when the XREAL Air connects to the XREAL Adapter directly.
Default brightness up button
- Hold for approximately 3 seconds until a beep
Switches the glasses between 2D and 3D modes. Not applicable when Beam is connected.
- Hold for about 6 seconds until two beeps
Adjusts the glasses to operate at 120 Hz, applicable only during screen mirroring. Not recommended for Nebula or Beam usage, where the maximum supported refresh rate is 72 Hz.
Default brightness down button
- Hold for approximately 3 seconds until a beep
Enables DP audio passthrough when using glasses. Particularly beneficial when the XREAL Air pairs with third-party adapters that output DP audio. Not applicable when Beam is connected.
All button adjustments do not have a memory function. After re-plugging the connection, the button functions will revert to those shown in the above diagram. If you encounter difficulties during the button adjustment process, you can attempt to unplug and then plug in the glasses again before making further adjustments