This feature covers those ligatures which may be used for special effect, at the user's preference. Then, if the glyph needs repositioning, an application may apply a single adjustment, pair adjustment, or contextual adjustment positioning lookup to modify its position.įunction: Replaces a sequence of glyphs with a single glyph which is preferred for typographic purposes. Recommended implementation: First, a single or contextual substitution lookup implements the subscript glyph (GSUB lookup type 1). The user applies this feature to Industria to get the alternate form of g.įunction: The 'subs' feature may replace a default glyph with a subscript glyph, or it may combine a glyph substitution with positioning adjustments for proper placement. This feature replaces the default forms with the stylistic alternates. As in the case of swash glyphs, there may be more than one alternate form. The user may apply this feature to get oldstyle figures to align vertically in a column.įunction: Many fonts contain alternate glyph designs for a purely esthetic effect these don't always fit into a clear category like swash or historical. Of course this feature would not be present in monospaced designs. Tabular widths will generally be the default, but this cannot be safely assumed. The application can use this feature to automatically access the superior figures (more legible than scaled figures) for footnotes, or the user can apply it to Mssr to get the classic form.įunction: Replaces figure glyphs set on proportional widths with corresponding glyphs set on uniform (tabular) widths. The application can use this feature to automatically access the inferior figures (more legible than scaled figures).įunction: Replaces lining or oldstyle figures with superior figures (primarily for footnote indication), and replaces lowercase letters with superior letters (primarily for abbreviated French titles). May also replace lowercase characters with alphabetic inferiors. The user may apply this feature to get even spacing for lining figures used as dates in an all-cap headline.įunction: Replaces lining or oldstyle figures with inferior figures (smaller glyphs which sit lower than the standard baseline, primarily for chemical or mathematical notation).

In the string 11/17 selected by the user, the application turns the 11 into numerators, and the slash into a fraction slash when the user applies the fraction feature.įunction: Replaces figure glyphs set on uniform (tabular) widths with corresponding glyphs set on glyph-specific (proportional) widths. The glyph for ffl replaces the sequence of glyphs f f l.įunction: Replaces selected figures which precede a slash with numerator figures, and replaces the typographic slash with the fraction slash. This feature covers the ligatures which the designer/manufacturer judges should be used in normal conditions. The user enters 3/4 in a recipe and gets the threequarters fraction.įunction: Replaces a sequence of glyphs with a single glyph which is preferred for typographic purposes. In the string 11/17 selected by the user, the application turns the 17 into denominators when the user applies the fraction feature.įunction: Replaces figures separated by a slash with 'common' (diagonal) fractions. The dashes, bracketing characters, guillemet quotes and the like shift up to match the capitals, and oldstyle figures change to lining figures.įunction: Replaces selected figures which follow a slash with denominator figures. The user selects a block of text and applies this feature.

Also, lining figures are the same height (or close to it) as capitals, and fit much better with all-capital text.

Some characters should be shifted vertically to fit the higher visual center of all-capital or lining text. By default, glyphs in a text face are designed to work with lowercase characters. Function: Shifts various punctuation marks up to a position that works better with all-capital sequences or sets of lining figures also changes oldstyle figures to lining figures.

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