Your email address is your 'identity' within Lt.
To change your email address, log in to Lt, select your name or email address in the top right corner of the window and select Change Email.
Enter your new email address into the Change email dialog box.
A confirmation email will be sent to your new email address. To complete the process, you must click the Continue button in the email. You will then be redirected to a web page where you will be required to enter your password to confirm the change. This ensures that only you are able to change your email address.