PS4 Controller 10 spell slots (updated)

Holding R1 puts you into "keyboard mode" from there use the Dpad or face buttons to pick spells from 4 - 0 (4,5,6,7 on D- pad and 8,9,0 on Square, triangle and circle) then just press X to cast and release R1 to go back to normal. Toggle sneak is now on Right touchpad.