That is quite ugly.. I get my default uis castbar in the middle of the hp bar.. Can i get that sorted in some way or do i need to change the place for the hp/mana bar?
I got the setting cast bar underneath turned on so :<
go to shadow uf options as advised above and go to text, there will be options like currenthp/totalhp, just tick the box that has %hp. You get options to change the text at the left of the bar and right, I would advise right, done this last night myself for my shadow priest.
Note you will need to untick anything you don't want otherwise you will end up with all the information squeezed in to the one box.