[gtk/matthiasc/for-master: 12/13] docs: Tweak GdkToplevel docs

[Matthias Clasen <matthiasc src gnome org>]

commit a42a7338bffe217313fad9ceefd4694772d6e706
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 29 14:00:24 2020 -0400

    docs: Tweak GdkToplevel docs

 gdk/gdktoplevel.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/gdk/gdktoplevel.c b/gdk/gdktoplevel.c
index 38a527c1ba..34328db10d 100644
--- a/gdk/gdktoplevel.c
+++ b/gdk/gdktoplevel.c
@@ -30,8 +30,14 @@
  * SECTION:gdktoplevel
  * @Short_description: Interface for toplevel surfaces
  * @Title: Toplevels
+ * @See_also: #GdkSurface, #GdkPopup
  *
  * A #GdkToplevel is a freestanding toplevel surface.
+ *
+ * The #GdkToplevel interface provides useful APIs for
+ * interacting with the windowing system, such as controlling
+ * maximization and size of the surface, setting icons and
+ * transient parents for dialogs.
  */
 
 G_DEFINE_INTERFACE (GdkToplevel, gdk_toplevel, GDK_TYPE_SURFACE)