Menu theme development guide
Menu themes allow the user to customize where certain myth features are located. By creating a customized menu theme, users can tailor MythTV to there own usage. The goal of this guide is to familiarize users with the menu's XML format and to create a comprehensive list of actions that will allow the user to invoke plugins and other menus.
Menu themes are a series of XML documents. The XML document defines what "buttons" are shown on each menu. Each XML document describes one menu.