What does the icon that looks like a leaning man with arms outspread do? What about the rest of the other 2 icons do?

The first one looks like a hypo also. I thought it was a rotation lock but it doesn’t seem to have any effect if I tap it (regardless of the position of the hard switch on the side).

The above symptom may occur on the following systems:

IdeaPad Tablet K1

--> On/mute micropohne

--> Lock home screen

--> On/Mute sound volume