3. In the Accounts and import section, click "Add another email address"
4. A new window will pop up, enter the information accordingly and click "Next Step"
5. Click "Send Verification". An email will be sent to the specified email address for verification. A verification code or link can be found in that email. You can verify by either method, but it is more straightforward to enter the verification code found in the email.
6. After it is completed, you can select the newly set up address by clicking the "From" button.