I have the free version of DraftSight, I have all of the relevant ESnap options turned on, but everytime I try to snap to like a corner of a building I have drawn, it doesn't snap to the corner and instead selects a point near.  The only way I can get it to snap is by manually clicking "Snap to..." before each click, meaning I have to click twice for any snap I'm looking for.  Is this a limitation of the free version?