Adding a new attribute to site - "Dont Link in Navigation"

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The site I am working with in Concrete5 doesn't have the attribute option "Don't Link in Navigation".

How am I able to add/install this attribute to my site so I am able to apply it to a desired page?

Many thanks!

 
jamesleech replied on at Permalink Reply
jamesleech
I'm guessing you worked this out by now. Superfish and megamenu add this attribute when they are installed. But it won't always work, some themes such as Slate won't integrate with the Superfish menu.