There are several items in the diagram. Down the left side is the angle of altitude/elevation, ranging from 0 to 90. Across the bottom of the diagram are the hours of the day. The thick green line just above represents the horizon. The moon and Sun are plotted for every half hour on the day (00:30, 01:00, 01:30, etc.). The diagram gives a quick view of when the Moon and Sun are highest in the sky and how high they get. There are also divisions marked on the diagram to show when the moon reaches the four cardinal compass directions (North, South, East and West) in Azimuth.

The actual figures for Azimuth and Altitude are listed in the lower window. These are displayed for hourly (rather than half-hourly) increments.

Whether or not the Moon icons are displayed on the diagram are controlled by the toolbar icons. Similarly, the Sun can be toggled on and off with other toolbar icons.

The diagram and data can be printed out as well.