Looking to have a nice background for your Twitter profile page. Then check out this tutorial on how you can create one using PowerPoint (or Keynote if you work on a Mac).
It requires you to download a PowerPoint template with areas marked where you are free to unleash your creative skills. Once satisfied, simply export the PowerPoint slide as a JPEG image and upload it to your Twitter page.
These PowerPoint templates are 1920Γβ1200 pixels in size to account for most computer screens; feel free to change the template size to suit your needs.
You may also want to check out another tutorial on creating Twitter backgrounds using profile pictures of Facebook friends. Thanks Brian Solis.