Lenovo ThinkPad X1 Yoga User Manual page 24

1 Camera status indicator
When this indicator is on, the camera is in use.
2
Fn Lock indicator
This indicator shows the status of Fn Lock function. For more information, see "Using the special keys"
on page 23.
3 Speaker-mute indicator
When this indicator is on, the speakers are muted.
4 Microphone-mute indicator
When this indicator is on, the microphones are muted.
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User Guide