After opening the account preferences page in a browser, click the "More Actions" drop-down and then click on "Edit Profile" from the options below. This will take you to the "Edit profile" page where you can change your name.
After opening the account preferences page in a browser, click the "More Actions" drop-down and then click on "Edit Profile" from the options below. This will take you to the "Edit profile" page where you can change your name.