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** : 
@@ -89,4 +91,8 @@ new VisibilityCone visibilityCone = new VisibilityCone(topocentricFrame, satelli
 * A [TopocentricFrame](https://www.orekit.org/site-orekit-development/apidocs/org/orekit/frames/TopocentricFrame.html), a [Satellite](Satellite), a [Header](Header), an angle of aperture :
 ```Java
 new VisibilityCone visibilityCone = new VisibilityCone(topocentricFrame, satellite, header, angleOfAperture);
-```
\ No newline at end of file
+```
+
+# Functions
+
+noDisplay() - void : Allows the user to not display the visibility cone
\ No newline at end of file