Canon PowerShot V10 Vlog Camera (Black) - Manual (Page 49)

Note
You can tap [ ] to activate autofocus during standby, after
which focusing is locked. The icon changes to [ ]. To unlock
focusing, tap it again.
If [ ] is not displayed, press the < > key.
A green frame appears once the subject is in focus. A yellow
frame is displayed with [
! ] when the camera cannot focus on
subjects.
Caution
If you perform camera operations during movie recording, the
camera's built-in microphone may also record sounds of the
camera operations.
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