Fonts: Difference between revisions

@@ Line 69: / Line 69: @@
 };
 </syntaxhighlight>
+=== Use custom font substitutions ===
+Sometimes, documents may appear to have bad kerning or hard-to-read letter spacing, due to a bad substitution.
+For example, Okular may show in the ''Document Properties'' dialog that it has substituted DejaVu Sans Mono (a sans-serif font) in place of "NewCenturySchlbk". <code>fc-match NewCenturySchlbk</code> would display similiar info.
+Adding this to your <code>/etc/nixos/configuration.nix</code> should prompt it to use the nicer serif *Schola* font instead:
+<syntaxhighlight lang="nix">
+fonts = {
+  fonts = with pkgs; [ gyre-fonts ];
+  fontconfig = {
+    localConf = ''
+      <!-- use a less horrible font substition for pdfs such as https://www.bkent.net/Doc/mdarchiv.pdf -->
+      <match target="pattern">
+        <test qual="any" name="family"><string>NewCenturySchlbk</string></test>
+        <edit name="family" mode="assign" binding="same"><string>TeX Gyre Schola</string></edit>
+      </match>
+    '';
+  };
+};
+</syntaxhighlight>
+For more information and examples on the xml configuration language:
+* https://linux.die.net/man/5/fonts-conf
+* https://wiki.archlinux.org/index.php/Font_configuration
+* https://wiki.archlinux.org/index.php/Font_configuration/Examples
 == Troubleshooting ==