In order to manage your account settings on Yahoo, Kindly follow these Steps:

• Go directly to www.Yahoo.com or simply put this address on the address bar .
• Log in to your account and open settings directly and go to Accounts section.
• Click on “Edit” option given on the upper right corner of the screen to make necessary changes in it.
• By clicking on “Add”, you can add an extra email address there.
• If you want to make appropriate changes to secure your account, go to security option.
• You can also configure your default sending account after adding an new account.
• Final step is to click on the green “Save” option to save these settings.