Shift-Alt-O. The Unicode specification makes œ and Œ ( 'LATIN SMALL LIGATURE OE' and 'LATIN CAPITAL LIGATURE OE') part of Latin Extended-A Block. All other letters with French accents are part of Latin-1 Supplement. Unfortunately, the commonly-favoured ISO-8859-1 encoding doesn't include "œ" and "Œ". As a consequence, while those characters may appear in a text editor configured to save files in ISO-8859-1 encoding, they'll appear as question marks when reopening the document. The Latin-1 supplement seems to offer characters that look the same: 'STRING TERMINATOR' (U+009C) and 'PARTIAL LINE BACKWARD' (U+008C). But I don't think it's a good idea to use them as their name suggests they have another purpose. Googling on "latin-extended-b iso-8859-1" I discovered this page listing all differences between ANSI (aka Windows-1252), Mac Roman and ISO-8859-1. Very useful! It seems that ISO-8851-1 was not such a clever choice, but I can't find any multiplatform 8-bit encoding including every commonly used French character.