HYPHENs used as parts of compound words (i.e., co-operation), compound adjectives (i.e., mineral-bearing), or to reduce spaces by breaking words at the end of a line. Certain words have compulsory hyphenation as per the WORD LIST in the SPECIFICATIONS and there are RULEs about where TYPESETTERs can and cannot break words for aesthetic purposes.

Be sure "hyphenation" is turned on when you want words to break between syllables, check reference manuals for "how to"

The practice of dividing words by leaving part of the word at the end of one line and continuing it on to the next, with a hyphen at the end of the first part of the word. Many words have their own rules for hyphenation that are not consistent with the general rules of the language, and must be hyphenated according to an exception word dictionary.

The splitting of a word across lines, as an aid to uniform line breaking.

Breaking of words into syllables separated by hyphens. Impedes readability but is usually necessary to maintain even right margins and text colour in fully justified type.

Two classes of hyphenation are used in preparing documentation: editorial and typesetting. Editorial hyphenation considers hyphenation for compound words and prefixes; judgements are made on context and standard use of the language at a given time. Typesetting hyphenation considers the breaking of words by syllable at the end of lines to create an elegant text design.