diff --git a/docs/rc.xml.all b/docs/rc.xml.all
index 2d951b4a..d796e673 100644
--- a/docs/rc.xml.all
+++ b/docs/rc.xml.all
@@ -131,9 +131,16 @@
     <popupShow>Never</popupShow>
     <!-- Let client redraw its contents while resizing -->
     <drawContents>yes</drawContents>
-    <cornerRange>8</cornerRange>
     <!-- Borders are effectively 8 pixels wide regardless of visual appearance -->
     <minimumArea>8</minimumArea>
+
+    <!--
+      Set cornerRange to a positive value to increase the size of corner
+      regions for mouse actions and diagonal window resizing. When omitted,
+      the default size of the corner region is half of the titlebar height.
+
+      <cornerRange>8</cornerRange>
+    -->
   </resize>
 
   <focus>