Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 58)

Automatic Sensor Cleaning
Whenever the power switch is set to < >, the sensor is cleaned automatically
(which may make a faint sound). During the sensor cleaning, the screen will display
[
]. To enable automatic sensor cleaning when the power switch is set to < > as
well, you can set this in [ : Sensor cleaning ] ( ).
If you repeatedly turn the power switch to < > or < > within a short time
period, the [ ] icon may not be displayed, but this does not indicate the camera is
malfunctioning.
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