Is it possible to select specific roles on a center tab that its center is set to all? When selecting that center the audience box appears empty, without any role in it. I just want to hide this center to just two specific roles

The Center assigned to a Role is selected when the Role is created. A user won’t be able to select their Center. If you want to restrict the Tab the go to the Audience of the Tab you want to restrict. Or expand more on what you are wanting to achieve please.

Yeah, I want to hide a menu link (center tab) from two roles, but on the setting of the center tab, its center is set to

all

and on the audience option there is no roles, it just appears as an empty box, so is it possible todo this when the center is all or do I need to filter this by a specific center?

Go to the Center Tab, Audience and set the roles you are ‘including’. No option to ‘exclude’ the two roles.

Thats what I mean, there are no roles on the audience box, it appears empty, but just when setting the center to all

now I see what you mean. Do the two roles that you are wanting to limit, share the same Center? maybe you are going to have to create multiple center tabs to 'add' to the other roles. Seems that NS is saying "All" centers will include "All" roles.