diff --git a/Docs/README.gui b/Docs/README.gui
index 34f4cbbbf..9ff601b53 100644
--- a/Docs/README.gui
+++ b/Docs/README.gui
@@ -390,6 +390,7 @@ Example:
360
+
textbox
-------
@@ -413,4 +414,20 @@ property tree, like:
true
+
+hrule
+-----
+
+Draws a horizontal line. Accepts color and thickness ():
+
+
+
+ 1.0
+ 0.0
+ 0.0
+
+ 2
+
+
+
__end__