If you have the PhoneTree® 2100, you will only be able to have one icon on your PhoneTree® desktop. This is because the PhoneTree® 2100 is a single-message system, with one call session in progress at any given time. However, you can have as many different lists as your hard drive will allow, and you can still sort your members into as many as 36 different groups. If you have a PhoneTree® 2500 or 3500, use the PhoneTree® Administrator on the Admin Screen to add more PhoneTrees to your PhoneTree® desktop.