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; rendering the workspace, the reference grid, and the first 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.