Be patient.  As they grow and mature they will roam more. 
Good luck with that.  They will decide where they want to hang out when they are not out foraging.  Usually that's in the shade if it is hot, under something to protect against flying predators, or on something where they can perch.  Perching seems to be really enjoyable as play.  If they are pets and lap chicks they may hang around the patio to be close to you. 
If you have trees that provide shade and maybe keep the ground under it bare they might like that.  Those are often good areas for them to take a dust bath.  Maybe put something there they can hide under or perch on, that might get them to spend most of their down time there.  It might help some if it is near where they sleep at night.  Often at first they seem to like to hang in the area they sleep but soon they will decide where they want to hang.  That could be anywhere.