Specifies the number of characters that must appear before a hyphen during hyphenation, to prevent words from breaking too close to the beginning of a word. For example, entering thybef 3 means that the word 'hyphenated' could not be broken as 'hy-phenated'.
Syntax
<?thybef min ch before hyph:n?> <?thybef>
[no parameter]
Invoke the Hyphenation - min chars before hyphen dialog box.