PATH Mac OS 8 and 9 Developer Documentation > Text and Other International Services > Apple Type Services for Unicode Imaging (ATSUI) > Apple Type Services for Unicode Imaging Reference

Mathematical Extras Feature Selector Constants

Fonts that support the mathematical extras feature type allow you to specify certain math-formatting conventions, using selectors such as those shown in Table D-16.

Table D-16 Feature selectors for the kMathematicalExtrasType feature type

Constant	Explanation
`kHyphenToMinusOnSelector kHyphenToMinusOffSelector`	Allows or prevents the automatic replacement of the sequence space-hyphen-space (or the hyphen in the sequence numeral-hyphen-numeral) with a minus sign glyph (-).
`kAsteriskToMultiplyOnSelector kAsteriskToMultiplyOffSelector`	Allows or prevents the automatic replacement of the sequence space-asterisk-space (or the asterisk in the sequence numeral-asterisk-numeral) with a multiplication sign glyph ().
`kSlashToDivideOnSelector kSlashToDivideOffSelector`	Allows or prevents the automatic replacement of the sequence space-slash-space (or the slash in the sequence numeral-slash- numeral) with a division sign glyph ().
`kInequalityLigaturesOnSelector kInequalityLigaturesOffSelector`	Allows or prevents the automatic replacement of sequences such as ">=" and "<=" with equivalent ligatures "≥" and "≤".
`kExponentsOnSelector kExponentsOffSelector`	Allows or prevents the automatic replacement of the sequence exponentiation glyph --numerals with the superior forms of the numerals. An example of an exponentiation glyph is "^".

Note: By convention, specifying the kHyphenToMinusOnSelector in the mathematical extras feature type overrides specifying the kHyphenToEnDashOnSelector in the typographic extras feature type.