This is my part of my vacuum cleaner. There are two symbols next to a pedal that operates a brush; and I always have to think hard how to put it.
To be honest, I always thought that a brush was indicated as lower symbol, and I expected the brush to work like most knobs, pedals and switches do, switch on ‘off’ is off, on ‘on’ is on, like:
However, when the control is on the ‘brush’-symbol, the brush is in and the other way around;
Actually, now I think what is depicted is not the brush, but the floor, i.e. a carpet (‘brush-symbol’) or a level (e.g., wooden) floor (rectangle).
Submitted by Dick de Waard