Datavideo iCAST MINI Instruction Manual page 28

If the "CAM" button is pressed when it is shown in red, the "CAM" button will
become blue. At this time, the Auto-Tracking function will be turned off and
the screen will switch to "Camera Preset" again.
7. Volume: This slider allows you to adjust the volume for monitoring
8. HDMI/UVC: This is the volume adjustment slider for the main output
9. Button for locking main output volume: Once this lock icon is pressed, the
volume for the main output will be locked and can not be adjusted.
10. Volume Meter: This is the range of the volume meter for the main output
and it can be adjusted by the "Audio>HDMI/UVC".
11. Button for switching the "Home" Layout: When the "Home" page's
"Source" and "PIP" are shown in vertical mode, you can press this button to
show them in the horizontal mode. Moreover, it can hide the "Camera Preset"
area. If the "Home" page is shown in horizontal mode, press this button once
to switch to the vertical mode.
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