Show Dispersion Range in Vectorworks?

Hey guys!
So lately, I've been trying to plot out a sound plot for theatre I'm in and I'm having trouble trying to see what the dispersion of the speakers looks like. I checked out the 2015 manual for vectorworks and it says that within the perameters you can show "Show Dispersion Range" but I'm unable to find a way to do it in the actual program. Am I missing something here? should there be different program that I should be using?
Any help would be greatly appreciated, thank you!

Also this is the link to the manual with the section I'm talking about
http://app-help.vectorworks.net/201..._Guide/LightingDesign2/Inserting_Speakers.htm
 

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