 The ligatures œ and æ can be keyed in by using either or respectively, in the fr-oss keyboard layout; their upper case equivalents can be generated using the same key combinations plus the French Shift key.Other useful punctuation symbols, such as ≤, ≥, or ≠ can be more easily accessed in the same way.Also called angle quotes, French quotation marks, double chevrons are polylines pointed like arrows (« or »), sometimes forming a complementary set of punctuation marks used as a form of quotation mark.