Aircon button

[Cwt1990]

Hi all, please could someone kindly explain what this button does please? I know I'm dumb haha... Thanks

 

[NHN]

Center dash vents & yes that's dumb lol

 

[Cwt1990]

Haha thank you please don't rub it in, I already feel stupid about it Haha although i asked because I don't think they're working properly lol, cheers