Reference for Contour lines on Plot Plan

[kkail]

Good morning! The documentation for HD Pro 2014 shows how to import X,Y,Z data to create contour lines but does not indicate how to set the reference point. I created the perimeter using the data from a deed. Is there a way once the plot is entered to designate which is the "point of beginning" and hence 0,0 for the Cartesian coordinates? Thanks!