The Profile spacing control adjusts the displayed distance between the beams in the Rear, Side, Plan and 3D views. You can adjust the spacing between beams from 1 pixel to 10 pixels apart.
The Number of Profiles box displays the maximum number of profiles visible in the Plan view at its current size and profile spacing. This value is incremented up or down as you change the profile spacing.
The difference between minimum and maximum spacing of the same data within the same size window is illustrated below.