Now copy these values to Typo Ascent and Descent and HHead Ascent and Descent, except make the descent negative for these fields. These will become the Win Ascent and Win Descent fields (both positive values). Figure out a) the top of your highest commonly-used accent plus any extra padding you require between lines, and b) the depth of your lowest (commonly-used) descender. (Originally, these settings were for the OS/2 operating system, but are now used by most type engines.) Make sure all the IsOffset fields are not checked. Go to Element> Font Info> OS/2> Metrics.So only try to accommodate the glyphs you think will be used in normal text. There are also OpenType tricks to change the line-spacing for certain languages that use a lot of tall glyphs. These trouble-makers don’t have to spoil the party, because most text-setting engines will recognise when you’ve used an over-large character and increase the spacing on that one line. Note, though, that there are a few really crazy tall characters out there, such as Ǻ - A with ring above and acute. This is finally where you need to consider how high your tallest accent will be and how low your lowest descender.
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