1. A computer-implemented method for providing position pegs that relate geometric objects to a reference grid positioned in a three-dimensional graphics workspace, the method comprising: determining a length of a stalk portion of a first position peg that couples a first geometric object to the reference grid, wherein the length of the stalk portion indicates to an end user the distance between the first geometric object and the reference grid; determining an inner radius of a base portion of the first position peg based on the distance between the first geometric object and the reference grid; determining that a base portion of a second position peg that corresponds to a second geometric object in the graphics workspace overlaps with the base portion of the first position peg; combining at least the second position peg with the first position peg to produce an aggregated position peg that corresponds to at least both the first geometric object and the second geometric object; rendering the workspace, the reference grid, and the aggregated position peg as viewed from a camera to produce a display image; and storing the display image in a memory or displaying the display image on a display device.