add help page to menu of custom post type

I have a plugin, and a shortcode defined with the plugin. I have custom taxonomies defined as well. It is all working well. I would like to add a "help" page, or instructions to the user on how to use the shortcode - ie. what parameters are available. I do not have any other settings defined with this plugin - and I don't believe most users will have access to the "Settings" pages anyway. How do I add an "Info" page to my plugin menu of my custom post type? I would like this page to be one of the options when in my plugin pages.

Thank you.