Proofreading produces the works on Wikisource from page scans. Page scans are normally in DjVu or PDF format which are uploaded to Wikimedia Commons. Proofreading takes place in the Index and Page
The Proofread of the Month (PotM) is a good place to start for people who want to learn how proofreading works on Wikisource. This project runs a new work each month and invites all users to take part.
Page scans are used for proofreading on Wikisource. This page describes how to use, browse, navigate and edit scanned pages as well as the different functions of the Index and Page namespaces.