He encontrado este artículo que explica cómo cambiar el encabezado de twitter. Ha sido publicado este día en la página de Mashable Social Media. Se los dejo para que lo hagan y tengan su nuevo perfil de Twitter.
Good news, Twitter lovers. Twitter has blessed all of you with a new way to dress up your profile pages: Header Images. Yes, these are a lot like Facebook and Google + cover photos, and the process for adding them is just as simple.
First, take a look at your new Twitter Profile page. No, not your homepage, the page that’s called “Me” on Twitter’s website and on your favorite mobile app. You can make the change through Twitter’s website (via https://twitter.com/settings/design) or you can actually make the change right on your mobile device. In our case, we first chose the newly updated iPad app. That process is outlined here and in the gallery. We also did the same thing on Twitter’s Web site. The process is slightly different. You’ll find those details in the gallery.
Select the “Me” option from the left-hand menu bar. You’ll notice this page looks completely different. Choose the settings icon that appears under your profile image or avatar. Select the “Edit Profile” option.
Select “Header” and then choose from two options: “Take Photo” or “Choose Existing photo.” The former will use your device camera to take a new image. The latter lets you select from your library of images.
Once you have an image, you can move and scale it as you please. Original image size cannot exceed 1252×626 pixels (with a max file size of 5MB). Twitter does not specify a minimum size, but anything smaller than 640 pixels wide will likely look bad.
With that done, your new header image appears behind your avatar. My first attempt, with this fireworks image makes it look as if my head is exploding. I may soon change it.
The benefit of the image appearing behind your avatar is that you can, as with Facebook cover photos and Google + cover images, create a sense of interaction between your avatar and the header image.
Have some fun and share you creations and experiences with the new apps and Twitter profile pages in the comments below.