Specify a start point as a base point, and optionally specify another location as the point of closure.
When you specify a start point, the Coordinate Geometry Editor requires that you specify a point of closure:
Specify a start point and a point of closure using either COGO point data or Easting and Northing values:
Point Name/Number
Easting (X) and Northing (Y)
In the drawing, glyphs are displayed to indicate the start point and point of closure .