Originally posted by Pure_Morning that means not all your verts are lined up properly along the 0 axis. Grab all the verts in one go that you want to be on that line and scale them on the axis (probably z) untill they line up (the scaling handle should sit under the middle scale handle). What do you mean scale them? This doesn't sound like the right tool to me. How does this work? I want to line up all the vertices on the right side of my complex poly so that I can mirror the poly and not have a gap. Thanks, Stu