Form: Add Grid Lines at Selected Point
After selecting one or more point objects in the model, use the Edit menu > Edit Points > Add Grid at Selected Points command to access the Add Grid Lines at Selected Point form and add grid lines in the current coordinate/grid system.
Use the options on the form to specify that the new grid line(s) be parallel to the X, Y, or Z axis in the current coordinate system. A new grid line will be added at each selected point.