Blindfold mode

I wanna turn on "Blindfold mode" on. At lichess.org/account/preferences/display there isn't setting that turn Blindfold on. But in every lichess discussion that I found, they say go to lichess.org/account/preferences/display and turn Blindfold on.
So how do I turn on Blindfold mode if lichess.org/account/preferences/display didn't help?
Premove Thanks)

And I didn't miss blindfold button, I used control+F to try to find one, but there isn't one at preferences->game display page

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