PDMODE (System Variable)
Controls how point objects are displayed.
Values of 0, 2, 3, and 4 provide different geometric representations of point objects. A value of 1 specifies that nothing is displayed.
Specifying the value 32, 64, or 96 specifies a shape to draw around the point, in addition to the geometry drawn through it.
After you change PDMODE, the appearance of existing points updates the next time that the drawing is regenerated.