datango library library architecture and components Course structure Searching for content The search The filter function Selecting the content of a lesson Starting a mode Books and book pages Opening documentation datango trainer trainer bar architecture and components Control buttons Key functions as an alternative means of control The progress display Orientation and modes of the trainer Lessons containing audio The top-most window Top-most window architecture and components datango book reader Book reader architecture and components Selecting a book page's objects Keyword search Browser settings System requirements Internet Explorer settings Settings for Mozilla Firefox Notice of Liability