Is it a simple matter of going to where you suggested above and deleting the code for a button from a CMS box and instead putting the HTML for the button into it instead. I am not HTML trained but can access HTML for a button and slot it into the correct WP CMS box.
In an ideal world I am sure this would work but I have a feeling the answer will be no. If it is 'no' is it still simple and can you give an example of something like a button and how you'd do it. Like the name of the CMS area which is I think is under Navigation. The Wp_nav_menu means less to me as I have never uses a CMS either. Is this meaning a short cut ?
If you were able to show me an example for the normal button clicking Word Press user. Perhaps the above meant go to nav then menu and then somewhere else with your underscoring ?
Or perhaps a title in the Word Press help section would be easier than taking peoples time up on the forum.
Incidentally thanks for your answers so far its very helpful and gives me some hope of sorting things for sure! Perhaps the help menu then ?