I have set up an audience and want to enrol all users on the system to this audience in the easiest way possible.

I have taken a look at the bulk user actions and there is a drop down option next to ‘with selected uses’. If I click ‘ add to audience’ will this allow me to add all of the users on the system to a specific audience? I am hoping it will be more straightforward than having to create a separate CSV; is this at all possible?