Navigation Buttons and Links

Hi, 

I'm trying a landing page dashboard where I can put buttons that go to various locations, both inside OneStream and outside OneStream.  Some of these links will be to files in the box or SharePoint, and some will be to other Tableau dashboards.  

I'm struggling to figure out how to create the Navigation Argument so i can select it with my button component. 

Where do I go to build one?  Is there a blog post or article on this?