Hi @Chad_Leo , welcome to the forum
The ‘background image’ used to be a feature of a previous version of Asana’s UI and now no longer available.
If you can provide a link to the article where you read about this, perhaps the @Forum-team can pass that on to the Asana guide team to rectify.
I found this article, which is slightly outdated: How to control your profile settings in Asana | Product guide • Asana Product Guide
Since this is expected behavior and not a bug, I will move it to the Tips section.