Share Email Facebook Twitter LinkedIn To Define a Reference Point (AutoCAD Mechanical Toolset) At the Command prompt, enter AMPSNAPREF. Specify a reference point. Specify a relative point. Now you can use this point as a base point for specifying a relative point. Related Concepts About Virtual Snap Points (AutoCAD Mechanical Toolset) Related Tasks To Define the Center Point of a Rectangle (AutoCAD Mechanical Toolset)To Define the Midpoint Between Two Points (AutoCAD Mechanical Toolset)To Define a Point Relative to the Last Entered Point (AutoCAD Mechanical Toolset)To Define a Virtual Intersection Point Between Two Lines (AutoCAD Mechanical Toolset) Related Reference AutoCAD Mechanical toolset Commands for Working with Object Snaps