Some of you may have already noticed, but I just thought I’d alert you to the fact that you can now add a header image to your Twitter profile! It’s super easy and it seems like most normal sized pictures are fitting in there well. If you’re savvy with these kinds of things and want to make your own the dimensions are 1200 pixels x 600 pixels. Here’s how you add your fancy new header.
Go to Settings then Design.
At the bottom of that page it says Customize Your Own. The first option if Change Header. Click that upload your image and save. That’s it! Now you have a pretty picture!