I am using 3 walls as my basic background for apps. after installing an app shourtcut forces to create 4th page. testes difrent configurations like middle screen as 5th or 1st.. home button or either main screen can not be seted. it always goes back to first screen. useing this button as a return to 'puplit' works well, it's going back to the screen you had before running app, suddenly another push mess it up, first screen again.