![]() In order for kerning to produce identical results as well, developers must ensure that the Vertical Kerning (vkrn) feature record kern values between the rotated glyphs that are the same as kern values between their corresponding upright glyphs in the Kerning (kern) feature. The vendor may however set it to head.unitsPerEm, to prevent overlap during font proofing tests, for example.) Thus, proportional-width glyphs with rotated forms in the vrt2 feature will appear identically spaced in both vertical and horizontal writing. (The horizontal advance of the rotated glyph may be set to any value, since the glyph is intended only for vertical writing use. A rotated glyph must be designed such that its top side bearing and vertical advance as recorded in the Vertical Metrics ('vmtx') table are identical to the left side bearing and horizontal advance, respectively, of the corresponding upright glyph as recorded in the Horizontal Metrics ('hmtx') table. The predecessor feature, vert, is ignored. ATM/NT 4.1 and the Windows 2000 OTF driver impose the following requirements for an OpenType font with CFF outlines to be used for vertical writing: the vrt2 feature must be present in the GSUB table, it must comprises a single lookup of LookupType 1 and LookupFlag 0, and the lookup must have a single subtable. Note that these are a superset of the glyphs covered in the vert table. ![]() ![]() ![]() Combining Diacritical Marks for Symbolsįunction: Replaces some fixed-width (half-, third- or quarter-width) or proportional-width glyphs (mostly Latin or katakana) with forms suitable for vertical writing (that is, rotated 90 degrees clockwise).the “necessary” ones), and all the rest (as a print and web designer, I have a lot) in several categories that I turn on and off according to my needs. When I organize fonts on my Mac, I like to keep a special category for System and Application fonts that should always be active (i.e. ![]()
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