I've only used hubby's iPad a few times, but I remember pressing on an icon until this "X" appeared, and all the other icons wiggled (and scared me to pieces because I thought I'd broken his new iPad!). Then I held onto that icon and dragged it to the side and the next screen was visible and I dropped the icon where he wanted it.
But my memory could be all wrong here.
I know how to do it but don't allow me to change screen...