That's all it does, unticks the visibility, similar thing on your phone on the hamburger menu at the top right, I think it's done on a per device method, not per account.
Ah, sorry, thought you meant an entire calendar or whatever, I've got about 12 on mine, including some duplicates from multiple accounts and shared things so turn off visibility on some of those.
That's all it does, unticks the visibility, similar thing on your phone on the hamburger menu at the top right, I think it's done on a per device method, not per account.