From f60e144038a50c48ebbb928f4bf1bd8208d48f86 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Fri, 5 Feb 2016 06:53:11 +0100
Subject: [PATCH] Document rem as CSS unit

---
 docs/reference/gtk/css-properties.xml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/reference/gtk/css-properties.xml b/docs/reference/gtk/css-properties.xml
index 09fcc0b343..3b80b4ae8e 100644
--- a/docs/reference/gtk/css-properties.xml
+++ b/docs/reference/gtk/css-properties.xml
@@ -53,7 +53,7 @@ We use <literallayout> for syntax productions, and each line is put in a <code>
       The following basic datatypes are used throughout:
     </para>
 
-<literallayout><code>〈length〉 = 〈number〉 [ px | pt | em | ex | pc | in | cm | mm ]</code>
+<literallayout><code>〈length〉 = 〈number〉 [ px | pt | em | ex |rem | pc | in | cm | mm ]</code>
 <code>〈percentage〉 = 〈number〉 %</code>
 <code>〈angle〉 = 〈number〉 [ deg | grad | turn ]</code>
 <code>〈time〉 = 〈number〉 [ s | ms ]</code>
@@ -65,6 +65,11 @@ We use <literallayout> for syntax productions, and each line is put in a <code>
       which case they are resolved using the inherited font size value.
     </para>
 
+    <para>
+      The rem unit is resolved using the initial font size value, which is
+      not quite the same as the CSS definition of rem.
+    </para>
+
     <para>
       A common pattern among shorthand properties (called 'four sides') is one
       where one to four values can be specified, to determine a value for each
-- 
2.30.2