When I'm checking out a gun at a store, I always ask, what is considered downrange? They will tell me, point it down, up to the ceiling, or this direction, just not at anybody.
I never sweep, I point to where the store empolyee told me was considered downrange. If it's in the direction of a window, and a person is walking by, I put the gun down, not pointing at anyone.
If I take my own gun in to be looked at, I present it in a carrying case, say, "The gun is unloaded" Drop my hands to the side, and let them check the gun to make sure it is unloaded.