After you enter the username and password for a website, Magic Fill will securely save and automatically enter them on future visits. To use it, right click on the field after you fill it in. Once you login successfully, Maxthon 3 will prompt you one last time to save it to Magic Fill. Say yes and that'll be the last time you have to do that for *that* website. Manage your saved usernames and passwords by going to Menu/Options/Magic Fill.