> Unfortunately the way things are set up means that you can only specify horizontal kerning when laying out horizontal text and vertical kerning for vertical t

> Unfortunately the way things are set up means that you can only specify horizontal kerning when laying out horizontal text and vertical kerning for vertical text. If your script requires both, you are not going to have a good time. The Ts operator (sets text rise, ie changes the baseline) could be useful here. Text selection in PDF readers may even treat text with different text rise as being on the same line. > We could specify kerning manually with a custom translation matrix that translates the rendering location by the amount needed. There are two main downsides to this. First of all it would mean that instead of having a stream of glyphs to render, you'd need to define 9 floating point numbers (actually 6 due to reasons) between every pair of glyphs. Or use Td... 2 numbers.