Sony WF-1000XM4 Manual page 21

Hint
When tapping the touch sensor 2 or 3 times, tap it quickly with an interval of about 0.3 seconds between taps.
You can change the function assignments to the touch sensors of both the left and right units using the "Sony | Headphones
Connect" app. For example, the music playback function that is assigned to the touch sensor of the right unit in the factory
settings can be changed to the touch sensor of the left unit.
You can also change the settings that do not assign the music playback function, noise canceling function, Ambient Sound Mode
and playback volume adjustment function, etc. In this case, you can pair the device, reset the headset and initialize the headset.
Note
You cannot operate the touch sensors when not wearing the headset. If you disable the wearing detection automatic power off
function on the "Sony | Headphones Connect" app, the touch sensors can be operated even when the headset is not worn.
When you make initial settings for the Google Assistant on your smartphone, the function assignments to the touch sensors may
change automatically.
Check the function assignments to the touch sensors with the "Sony | Headphones Connect" app.
When you make initial settings for Amazon Alexa on your smartphone, the function assignments to the touch sensors may
change automatically.
Check the function assignments to the touch sensors with the "Sony | Headphones Connect" app.
Related Topic
What you can do with the "Sony | Headphones Connect" app
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