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9.5 \discretionary (generalized hyphenation point)



Handle word changes around hyphens. This command is not often used in LaTeX documents.

If a line break occurs at the point where \discretionary appears then TeX puts pre-break at the end of the current line and puts post-break at the start of the next line. If there is no line break here then TeX puts no-break.

In ‘difficult’ the three letters ffi form a ligature. But TeX can nonetheless break between the two ‘f’’s with this.


Note that users do not have to do this. It is typically handled automatically by TeX’s hyphenation algorithm.

Unofficial LaTeX2e reference manual