Need to remove or hide Duplicate option in my view

Need to remove or hide Duplicate option in my view

I don't want users to be able to Duplicate a record in my view.  I set permissions so that the "Duplicate" option is not checked, but it still shows up in the menu.  I found something about the view parameter below, but I don't know how/where to use it:

Show/Hide "Duplicate" option zc_DuplRec=<true/false
Any help is appreciated!