The Basic mode is designed to allow you to read and write emails online while continuing to download and manage your emails on your computer. The Advanced mode is designed to allow you to fully manage your email online and provides you with access to advanced email features such as an address books, folders, signatures, the ability to receive email in your webmail account from other POP email accounts and the ability to set up email filters. To change to Advanced mode, select Options from the menu on the left and then click on Switch to advanced mode (under the Save button).