Greasy Fork

Doesn't work?

The card still appears. How to activate the script? Where's the toggle?

It should automatically hide the cards. Not the old annotations though, for that there's an option here. After that, if you want to see the cards, just use the default annotations toggle switch:

OK, thanks. I am using Youtube Center where the annotation setting can be set from the script, my annotation toggle is already OFF by default at that time. After I visited the link you give me, somehow your script works :)