is there a trick to rotate items in sims 4?

if something still won't go where you want, open the cheat box (ctrl+shift+c) and type bb.moveobjects. then you can overlap things and put them on top of other objects. combine that with alt and you can place pretty much anything anywhere.

comma and full stop keys rotate whatever you have picked up. or keep holding the left click after picking it up and drag the mouse around. hold alt as well if you want it to turn freely instead of in 45 degree steps.