VisibilityCone.md

@@ -2,6 +2,8 @@ This page describes the content of a CZML document. Please read [How to get star
 
 #Visibility Cone
 
+** A VISIBILITY CONE MUST BE CREATED BEFORE A LINE OF VISIBILITY IS CREATED IF DONE MANUALLY **
+
 **Extends** : [CZMLPrimaryObject](CZMLPrimaryObject)
 
 **Example** : 
@@ -90,3 +92,7 @@ new VisibilityCone visibilityCone = new VisibilityCone(topocentricFrame, satelli
 ```Java
 new VisibilityCone visibilityCone = new VisibilityCone(topocentricFrame, satellite, header, angleOfAperture);
 ```
+
+# Functions
+
+noDisplay() - void : Allows the user to not display the visibility cone
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