Align objects


How can I align objects with others that are on a different level on the z-axis without affecting them? When I use the Move tool, it always moves on the Z axis as well. Where do I put the tick so that Rhino only moves my objects ( in this case the parking lots) on the X-Y axis ?

Thanks in advance.

Turrning on Project in the object snaps before moving is one way… (when working in the Top or Perspective views)