Shows or hides the JNow ecliptic grid in the active view window.
When you select this command, the JNow ecliptic grid will be shown in the active view window, and when you deselect this command, the JNow ecliptic grid will be hidden in the active view window.
If you're viewing from a planet other than the Earth, the JNow ecliptic grid appropriate to that planet will be shown.
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