Community Tip - You can change your system assigned username to something more personal in your community settings. X
Jnanesha,
In the right upper corner you will find My Options with a downward facing arrow to the right of it, place your cursor over the arrow and select:My Profile. You will then see the option to Edit Profile to the right side of your name on the farright side of the page. Once you select his you can edit your e-mail.