IronH:NZtechfreak: You mean the apps on the bottom of the homescreen? If so, you can change those. Long press and remove ones you want to change then add new one as per usual.Perhaps he means the actual "apps" icon in the dock. I can't move mine from its default position on the right hand side, I would like to move it to the middle of the dock.
Ah yes, quite possibly. That hasn't ever been possible to move on TW as far as I can recall. Personally I'd do away with TW on the S4 in any case and just install a third party launcher.