GHD on home interface

Would you know what the letters GHD at the top of the menu correspond to?
I specify that I am with an interface in French.

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GHD i think it’s
G = Gauche => left key
H = HAUT => Up key
D = droite => right key

Me i have a problem i have a challenge => to save view i have to click on GHD + B
I tried but nothing happen