Glyph Separation:
The glyph separation setting in the Ephemeris Options window is the same idea used in the chart viewer window, but instead of a circle, this referrs to the minimum amount of space between glyphs on the left and right side of the graph. You may notice that the value is somewhat larger here and that is because the vertical line is shorter than the length of line around the chart circle. The setting for this is found on the Main tab in the Graphic Ephemeris Options window: