Currently there's no Themes or Customization in the NEW Yahoo! Mail.
Exactly what the title idea states. This is something that is sorely needed in the NEW Yahoo! Mail. Being able to use Custom Backgrounds or Themes (ones that are MUCH better than the basic ones that the older Yahoo! Mail was using.
I want to be able to make my Inbox look like how I want it to look. A basic "Light", "Dark" and "Device" aesthetic is not good enough and is very boring and uninspiring, to say the least. This is what will keep me using the older Yahoo! Mail, as it at least has some kind of Theme system.
Damian Howard
shared this idea
Hi Damian, very sorry, but we currently have no plans in adding more themes or backgrounds. We had many before and it had very very low usage. Most of our community stayed with the default. So due to this and high upkeep we made the decision to not support more and simplify it. Thanks!