Twitter allows users to add banner.
It is a nice touch.
As you can see here ( as example ) :
You can do this by following these simple steps :
1- Select Setting as you can see in this picture :
2- Click on Design :
3- Go to "Customize Your Own" section, Then Ckick on Change Header.
Notice : Recommended dimensions of 1200×600Maximum file size of 5MB
4-Then Pick up your Image.
Adjust the image then click save.
Hope this help someone.