Version 6.10

• Improve math italic j and i spacing (#273).
• OpenType layout tables are now compiled with FontTools's feaLib instead of
  FontForge's own OpenType layout support.
• Various internal cleanups.
• Drop "case", "frac", "tnum" and "pnum" features from the Libertinus Mono
  font, they either were broken or not appropriate for a monospace font.

Version 6.9

• Many mathematical operator in Libertinus Math were scaled up and redesigned for better use in math mode.
• Libertinus Math now has fraktur alphabets (copied from STIX Two Math font) and sans serif italic Greek (slanted from the upright version).
• Overline mark (U+0305) no longer make i and j dotless.
• Overline mark should be placed higher than glyph ascenders.
• Fonts are now autohinted with Adobe’s psautohint instead of FontForge’s autohinter.
• Libertinus Keyboard had the German keys Bild misspelled as Build in both glyph name and ligature string.
• Several changes to glyph names for consistency and accuracy.
• Several minor reorganization to the OpenType features.

Version 6.8

• Fix missing “math” OpenType script from Libertinus Math.
• Add \QED symbol to Libertinus Math, also add Add ⦇ (U+2987) and ⦈ (U+2988).
• Fix mis-encoded glyphs in Libertinus Serif Semibold Italic.
• Make digits fitted in Libertinus Serif Initials font, and drop incomplete Greek, Cyrillic and Hebrew support.
• Add U+AB52 and U+A793 to Libertinus Serif Regular.

Version 6.7

• Add Cyrillic to Libertinus Serif Bold Italic.
• Many character additions to Libertinus Math.
• Set “is extended shape” flag to relevant Libertinus Math glyphs to fix script position on large symbols in Microsoft Word.
• Improve \coloneq and \eqcolon by increasing the space between the colon and the equal sign.
• Make upright \partial and \mbfpartial look upright, and make \mbfpartial really bold.
• Make the vertical bars in Libertinus Math match the height of the other delimiters.
• Use smaller value for SubscriptBaselineDropMin, the subscripts applied to sub formulas were positioned too low.
• Fix the side bearings for italic mathematical glyphs in Libertinus Math, making them symmetrical (20 units) and rework kerning tables according to text font kerning.
• Fix vertical variants of math symbols.
• Add more ligatures to Libertinus Serif, and add missing ligatures to other Libertinus Serif fonts for parity with the regular style.
• Move Th ligature to Discretionary Ligatures (“dlig”).
• Discretionary Ligatures can also be enable using ZWJ control character.
• Drop “fina” feature for Greek sigma, this feature is for Arabic-like scripts.
• Move short f substitutions to the more appropriate “calt” feature instead of “ccmp”.
• Drop “nalt” feature as all glyphs it substitutes to are encoded Unicode characters that can be accessed directly.
• Rename font files to match the PostScript name of each font.
• Make Libertinus Serif Semibold work on legacy applications that support only 4 styles per family.
• Fix disordered BlueValues causing warnings with Ghostscript.
• Make the PUA symbols that were in Libertinus Keyboard accessed as ligatures.
• Align the bottom of the colon with the period.
• Kern alternate W glyph similar to regular one.
• Harmonize the design of italic figures.
• Extend caps lining figures to (almost) all Serif faces and both proportional and tabular spacing.
• Fix Libertinus Serif Italic ђ, it looked like an т.
• Make few marks that combine two glyphs higher, so that they don’t bump into glyph ascenders.
• Lower Libertinus Mono asterisk and make it bigger.
• Make combining low line and over line contiguous.
• Make OpenType features more consistent across fonts.

Version 6.6

• Align MATH AxisHeight with minus and similar operators.
• Align single and double arrows to minus and equal signs.
• Fix Celsius, Fahrenheit and Ohm signs to take the style of their fonts.
• Fix Ohm sign side bearings.
• Fix Service Mark and Trade Mark in sans fonts to take their style.
• Unify the default for of Eng glyph across fonts, and add and alternate shape
  for Sami language.
• Fix Cyrillic small letter ef in display font to match the regular serif font.
• Dropped some more unused PUA slots.
• The copyleft symbol now used the proposed Unicode 11 code point.

Version 6.5

• Fix regressions in handling of extensible combining marks with LuaTeX.
• Add Latin bold italic sans-serif alphabet.
• Add mathematical double-struck digits.
• Enable slashed zero feature in math font.
• Add big sizes for more brackets; \lBrack, \rBrack, \langle, \rangle, \lAngle and \rAngle.
• Add big sizes of slash and backslash.
• Add \widetilde, \wideutilde and \widebreve.
• Fix side bearings of math blackboard capitals.
• Fix math glyphs with negative left side bearing that can clash with preceding glyphs.
• Make \vert and \Vert expansion consistent in size with the brackets.
• Remove tone bar glyphs; the support was not adequate for proper use.
• Remove math alphabet glyphs from text fonts.
• Fix glyphs incorrectly categorized as mark glyphs.
• Add Bitcoin currency symbol.
• Fix stacking of a-ring and macron.
• Fix “ct” and “st” historic ligatures and make them consistent across fonts.
• Fix mark positioning over AE and OE glyphs.
• Fix style of U+2100 (a/c), U+2101 (a/s), U+2015 (c/o) and U+2106 (c/u).
• Fix mark positioning over G and g glyphs.
• Make default and alternate J glyphs consistent across upright and italic fonts.
• Make U+00BA MASCULINE ORDINAL INDICATOR and U+00AA FEMININE ORDINAL INDICATOR
  have the same baseline in serif fonts.
• Position semibold serif i/j dot similar to other styles.
• Remove rudimentary MATH table from regular serif font.
• Fix alignment of U+2192, U+2198, U+2199 in the monospace font.
• Make more arrows fixed width in the monospace font.
• Make capital roman numbers in sans-serif and sans-serif italic fonts actually sans-serif.
• Make \product in sans-serif fonts actually sans-serif.
• The fonts can now be built with upstream FontForge, no patches needed, as well as Python 3.

Version 6.4

Fix broken extensibles of the left square bracket in the math font.

Version 6.3

• Add U+231C-231Fi and U+2A7D-2A7E to the math font.
• Add script math alphabet based on that of XITS Math font.
• Add monospaced math alphabet based on that of cmtt10 font with modified METAFONT parameters to better fit with Libertinus glyphs.
• Improve math top accent positions.
• Fix spacing of math italic i and j.
• Increase the gap between \sum and its limits.
• Improved math braces and brackets based on STIX Two Math font.
• Disable optical variants of math alphanumerics that were based on the text sup/superscript glyphs as they don’t look good besides being incomplete and inconsistent.
• Remove duplicate glyphs that caused broken GPOS generation.
• Drop optical bounds (‘opbd’, ‘rtbd’ and ‘lfbd’) features as they were incomplete and virtually unsupported.
• Fix text mark placement below O and o.
• Fix oldstyle numbers feature in Libertinus Serif Semibold that had wrong glyph mapping for 6, 7, 8 and 9.
• Use swash Q when followed by v.
• Various consistency fixes to font names and vertical metrics.
• Fix placement of the half ring in U+1E9A.
• Fix several Libertinus Serif Bold italic alternate glyphs that were not bold.
• Fix Libertinus Serif Italic U+2098-2099 (subscript m and n) that looked like superscript circled + and -.

Version 6.2

• Fixed missing big variant rule for U+27EF.
• Fixed swapped \phi and \varphi symbols.
• Fixed “fi” ligature in Serif Semibold Italic with small caps feature on.
• The “Qu” ligature is now implemented as alternate glyph substitution.
• Added missing small cap Qu alternate glyph to serif fonts.
• Added big radical variants.

Version 6.1

• Renamed the fonts from Libertine to Libertinus to be complaint with the Reserved Font Name clause of Linux Libertine license. Thanks to Frédéric Wang for the new name.
• Dropped legacy Mac platform font names.