Users sometimes need a little help, even with the best-designed applications. GNOME provides a built-in topic-oriented help system that uses the Mallard markup language. Pioneered by GNOME developers, Mallard is an agile and dynamic language that helps you write and revise quickly. Its topic-oriented design means your users can find the answers they need without sifting through a manual. With its unique linking and organization system, Mallard is the only language designed to handle plugin and vendor help in one coherent document.

Если вам требуется написать обычное руководство, то GNOME также поддерживает стандартный формат DocBook.