Ligatures Proofreading Tutorial, Page 1

The two ligatures æ and œ can be difficult to distinguish when they are printed italics. However, the œ (oe) ligature is usually rounder at the top, while the 'a' of æ is more teardrop-shaped. For example:

oe ligature ae ligature

The æ ligature is in Latin-1 (the character set that we use for proofreading), so we normally proofread it using the symbol directly. On the other hand, the œ ligature is not, so we proofread it with brackets like this: [oe]

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Distributed Proofreaders was founded in 2000 by Charles Franks to support the digitization of Public Domain books. Originally conceived to assist Project Gutenberg (PG), Distributed Proofreaders (DP) is now the main source of PG e-books. In 2002, Distributed Proofreaders became an official PG site. In May 2006, Distributed Proofreaders became a separate legal entity and continues to maintain a strong relationship with PG.