I've accidentally moved the bottom bar to the middle. How can I move it back?

[AC Question]

The bottom bar that contains the contacts, phone, messages and apps had accidentally been moved to the middle, and I can't move it back. I have a galaxy s4. it shows on every page, and overlaps other apps.

 

[B. Diddy]

Welcome to Android Central! That's odd. Are you running an alternative launcher, or the stock TouchWiz? Does it persist after a reboot? If so, then try wiping the cache partition: http://support.t-mobile.com/docs/DOC-5744