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I'm using a title font which has very few characters, and I need '+' and '=' for a given title, which are missing. Using fontspec, is it possible to import only these two missing glyphs from another font?

Note: it is a very similar question to this one, but I'd like to know if it can be done easily with fontspec.

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Why not use math mode e.g. $1+1=2$? – Leo Liu Aug 12 '11 at 11:10
That is a good idea, but my title font is scaled (huge is not big enough for my needs), so the math font doesn't scale the same. – ℝaphink Aug 12 '11 at 11:12
Switch to another font for the two glyphs. – Ulrike Fischer Aug 12 '11 at 14:36
@Ulrike: that would work too, but I wanted to know if there was a cleaner way (just in case). – ℝaphink Aug 12 '11 at 14:44
The clean way is to use a better font. All other solutions involve a font switch which you can do in various ways (commands, \XeTeXinterclass) but still is a font switch. – Ulrike Fischer Aug 12 '11 at 15:07
up vote 3 down vote accepted

If the symbols are used only in a few cases, the most efficient solution is to define \newcommand{\biggerplus}{{\myplusfont +}}, where \myplusfont is the declaration for choosing the substitute font.

If you really need to use directly + and =, then I suggest

\newfontfamily{\mytitlefont}{Some Font}

Instead of calling \mytitlefont for typesetting the titles, you'll call \choosetitlefont.

Solutions with \XeTeXintercharclass would avoid activating the characters, but will have the conditional anyway.

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