On reflection this text (which was also in CSS Fonts 3) is too brief: > When kerning is enabled, the OpenType kern feature is enabled (for vertical text runs the vkrn feature is enabled instead). how about > When kerning is enabled, the relevant OpenType kerning features are enabled (for upright,horizontally set characters and for rotated, vertically set characters, the `kern` feature; for upright, vertically set characters, the `vkrn` feature. ). followed by three examples - one of horizontally set text, one of vertically set text with all characters upright, and one of vertically set text with some characters rotated. I'm imagining color-coded backgrounds behind each glyph, for `kern` and `vkern`. That would also show (which should be obvious, but still) that a change between upright and rotated breaks kerning. -- GitHub Notification of comment by svgeesus Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/5295#issuecomment-655627232 using your GitHub accountReceived on Wednesday, 8 July 2020 16:34:40 UTC
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