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Document new environment variables

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Explain GDK_SCALE and GDK_DPI_SCALE.
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Matthias Clasen
2013-07-09 10:07:10 -04:00
parent 660a1f304e
commit 2c8ffef284
1 changed files with 25 additions and 0 deletions
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docs/reference/gtk/x11.sgml
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@ -81,6 +81,31 @@ The X11 GDK backend can be influenced with some additional environment variables
</para>
</formalpara>
<formalpara>
<title><envar>GDK_SCALE</envar></title>
<para>
Must be set to an integer, typically 2. If set, GDK will scale all
windows by the specified factor. Scaled output is meant to be used on
high-dpi displays. Normally, GDK will pick up a suitable scale factor
for each monitor from the display system. This environment variable
allows to override that.
</para>
</formalpara>
<formalpara>
<title><envar>GDK_DPI_SCALE</envar></title>
<para>
This can be useful when using scale-aware GTK+ applications together
with scale-unaware applications on a high-dpi display. In that case,
the font resolution can be doubled to make scale-unaware applications
readable, and <envar>GDK_DPI_SCALE=0.5</envar> can be set to compensate
for that in GTK+ applications which are already scaled by setting
<envar>GDK_SCALE=2</envar>.
</para>
</formalpara>
</refsect2>
</refsect1>