# Catalogue builder > Write a catalogue document with a form, checked as Quasar would check it. Source: https://quasar.achaverot.fr/docs/tools/catalogue-builder/ A catalogue adds your own entries and categories to the ones Quasar ships. Fill in the form and the document updates as you type, with the checks Quasar runs when you paste one in **Settings → Catalogues**. The format itself is written out on [catalogue format](/catalogue/format/).