Need to add more icons to the toolbar in webhelp

So, in the skin I'm using I see SEVERAL icons, including  "previous" and "next" .  However, when I go to the Webhelp properties window for my project, I don't have those options to include - only TOC, Index, Search, Glossary, and Print.  Why would I not be able to include those icons and their functionality in Webhelp if they are in the selected skin?  Is there another setting I'm missing?

Thanks,

kb