Tired of the same boring Yahoo Mail background? If you’re using the Yahoo Mail! Beta you can easily change your theme.
1. You’ll need to be using Yahoo Mail Beta to access this feature.
2. Go to the upper left hand corner and click on “Help” link.
3. Select “Themes” from the drop-down menu.
4. Choose your new Yahoo Mail theme and click “Done” to accept the changes.
5. Enjoy your new theme.