Microtypography and font expansion

The speedata Publisher is built on top of LuaTeX, a typesetting software with a strong focus on typography. Therefore it inherits all the possibilities offered by the layout engine. One of the older features is the ability to stretch or shrink glyph widths on demand to allow even better line breaking. TeX already uses the famous line breaking algorithm that optimizes the appearance of a full paragraph as a whole, not a line-by-line approach that might lead to large inter-word spacing. The ability to stretch or shrink glyphs by a little amount can lead to many more possible line breaks and thus enhancing the overall visual outcome of a paragraph. The famous Gutenberg 42 line bible (B42) has a similar approach to line breaking.