From f6eb767c831611aaa425b8488b8428a7b44aae68 Mon Sep 17 00:00:00 2001
From: Daniel Boles <dboles@src.gnome.org>
Date: Wed, 20 Sep 2017 17:34:43 +0100
Subject: [PATCH] Overlay: Document style classes added per position

---
 gtk/gtkoverlay.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gtk/gtkoverlay.c b/gtk/gtkoverlay.c
index 51be2b9752..84128b5d51 100644
--- a/gtk/gtkoverlay.c
+++ b/gtk/gtkoverlay.c
@@ -51,6 +51,12 @@
  * The GtkOverlay implementation of the GtkBuildable interface
  * supports placing a child as an overlay by specifying “overlay” as
  * the “type” attribute of a `<child>` element.
+ *
+ * # CSS nodes
+ *
+ * GtkOverlay has a single CSS node with the name “overlay”. Overlay children
+ * whose alignments cause them to be positioned at an edge get the style classes
+ * “.left”, “.right”, “.top”, and/or “.bottom” according to their position.
  */
 
 struct _GtkOverlayPrivate