# Importing missing glyphs in font

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.

• 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

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}
\newcommand{\choosetitlefont}{\mytitlefont\mytitlefonttrue}
\newif\ifmytitlefont
\let\pluschar=+
\catcode+=\active
\protected\def+{\ifmytitlefont{\myplusfont\pluschar}\else\pluschar\fi}
\let\equalschar==
\catcode==\active
\protected\def={\ifmytitlefont{\myplusfont\equalschar}\else\equalschar\fi}


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.