Registered features (OpenType 1.5)
The features listed below are sorted in alphabetical order by tag name. Click on the feature tag to view feature description and implementation, or go to the feature descriptions page.
| Feature Tag | Friendly Name |
|---|---|
| 'aalt' | Access All Alternates |
| 'abvf' | Above-base Forms |
| 'abvm' | Above-base Mark Positioning |
| 'abvs' | Above-base Substitutions |
| 'afrc' | Alternative Fractions |
| 'akhn' | Akhands |
| 'blwf' | Below-base Forms |
| 'blwm' | Below-base Mark Positioning |
| 'blws' | Below-base Substitutions |
| 'calt' | Contextual Alternates |
| 'case' | Case-Sensitive Forms |
| 'ccmp' | Glyph Composition / Decomposition |
| 'cfar' | Conjunct Form After Ro |
| 'cjct' | Conjunct Forms |
| 'clig' | Contextual Ligatures |
| 'cpct' | Centered CJK Punctuation |
| 'cpsp' | Capital Spacing |
| 'cswh' | Contextual Swash |
| 'curs' | Cursive Positioning |
| 'c2pc' | Petite Capitals From Capitals |
| 'c2sc' | Small Capitals From Capitals |
| 'dist' | Distances |
| 'dlig' | Discretionary Ligatures |
| 'dnom' | Denominators |
| 'expt' | Expert Forms |
| 'falt' | Final Glyph on Line Alternates |
| 'fin2' | Terminal Forms #2 |
| 'fin3' | Terminal Forms #3 |
| 'fina' | Terminal Forms |
| 'frac' | Fractions |
| 'fwid' | Full Widths |
| 'half' | Half Forms |
| 'haln' | Halant Forms |
| 'halt' | Alternate Half Widths |
| 'hist' | Historical Forms |
| 'hkna' | Horizontal Kana Alternates |
| 'hlig' | Historical Ligatures |
| 'hngl' | Hangul |
| 'hojo' | Hojo Kanji Forms (JIS X 0212-1990 Kanji Forms) |
| 'hwid' | Half Widths |
| 'init' | Initial Forms |
| 'isol' | Isolated Forms |
| 'ital' | Italics |
| 'jalt' | Justification Alternates |
| 'jp78' | JIS78 Forms |
| 'jp83' | JIS83 Forms |
| 'jp90' | JIS90 Forms |
| 'jp04' | JIS2004 Forms |
| 'kern' | Kerning |
| 'lfbd' | Left Bounds |
| 'liga' | Standard Ligatures |
| 'ljmo' | Leading Jamo Forms |
| 'lnum' | Lining Figures |
| 'locl' | Localized Forms |
| 'mark' | Mark Positioning |
| 'med2' | Medial Forms #2 |
| 'medi' | Medial Forms |
| 'mgrk' | Mathematical Greek |
| 'mkmk' | Mark to Mark Positioning |
| 'mset' | Mark Positioning via Substitution |
| 'nalt' | Alternate Annotation Forms |
| 'nlck' | NLC Kanji Forms |
| 'nukt' | Nukta Forms |
| 'numr' | Numerators |
| 'onum' | Oldstyle Figures |
| 'opbd' | Optical Bounds |
| 'ordn' | Ordinals |
| 'ornm' | Ornaments |
| 'palt' | Proportional Alternate Widths |
| 'pcap' | Petite Capitals |
| 'pkna' | Proportional Kana |
| 'pnum' | Proportional Figures |
| 'pref' | Pre-Base Forms |
| 'pres' | Pre-base Substitutions |
| 'pstf' | Post-base Forms |
| 'psts' | Post-base Substitutions |
| 'pwid' | Proportional Widths |
| 'qwid' | Quarter Widths |
| 'rand' | Randomize |
| 'rkrf' | Rakar Forms |
| 'rlig' | Required Ligatures |
| 'rphf' | Reph Forms |
| 'rtbd' | Right Bounds |
| 'rtla' | Right-to-left alternates |
| 'ruby' | Ruby Notation Forms |
| 'salt' | Stylistic Alternates |
| 'sinf' | Scientific Inferiors |
| 'size' | Optical size |
| 'smcp' | Small Capitals |
| 'smpl' | Simplified Forms |
| 'ss01' | Stylistic Set 1 |
| 'ss02' | Stylistic Set 2 |
| 'ss03' | Stylistic Set 3 |
| 'ss04' | Stylistic Set 4 |
| 'ss05' | Stylistic Set 5 |
| 'ss06' | Stylistic Set 6 |
| 'ss07' | Stylistic Set 7 |
| 'ss08' | Stylistic Set 8 |
| 'ss09' | Stylistic Set 9 |
| 'ss10' | Stylistic Set 10 |
| 'ss11' | Stylistic Set 11 |
| 'ss12' | Stylistic Set 12 |
| 'ss13' | Stylistic Set 13 |
| 'ss14' | Stylistic Set 14 |
| 'ss15' | Stylistic Set 15 |
| 'ss16' | Stylistic Set 16 |
| 'ss17' | Stylistic Set 17 |
| 'ss18' | Stylistic Set 18 |
| 'ss19' | Stylistic Set 19 |
| 'ss20' | Stylistic Set 20 |
| 'subs' | Subscript |
| 'sups' | Superscript |
| 'swsh' | Swash |
| 'titl' | Titling |
| 'tjmo' | Trailing Jamo Forms |
| 'tnam' | Traditional Name Forms |
| 'tnum' | Tabular Figures |
| 'trad' | Traditional Forms |
| 'twid' | Third Widths |
| 'unic' | Unicase |
| 'valt' | Alternate Vertical Metrics |
| 'vatu' | Vattu Variants |
| 'vert' | Vertical Writing |
| 'vhal' | Alternate Vertical Half Metrics |
| 'vjmo' | Vowel Jamo Forms |
| 'vkna' | Vertical Kana Alternates |
| 'vkrn' | Vertical Kerning |
| 'vpal' | Proportional Alternate Vertical Metrics |
| 'vrt2' | Vertical Alternates and Rotation |
| 'zero' | Slashed Zero |
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OpenType specification