The mail list tab is located on the Patron Window. When the mail list tab is clicked a patron's mail list information displays at the bottom of the patron window.
The Mail Lists for Patron window opens. A mail list that is marked with a bullet means the current patron belongs to the mail list.
Do this by single clicking the mail list that you want, it will become highlighted.
This adds the patron to the selected mail list.
Once they are added, a bullet appears beside the list.