diff --git a/doc/FocusablePanel.md b/doc/FocusablePanel.md
new file mode 100644
index 0000000..b75fe0a
--- /dev/null
+++ b/doc/FocusablePanel.md
@@ -0,0 +1,15 @@
+# FocusablePanel
+
+You can use this as a base class for your widgets instead of User Widget,
+and get the following behaviour:
+
+## Initial focus
+
+Set the Initial Focus Widget Name to the name of a focusable widget in this panel.
+When the panel os attached to the viewport, this widget will be given the focus.
+
+## Remembering focus
+
+This widget provides `SavePreviousFocus` and `RestorePreviousFocus` methods 
+which can save / restore focus as needed. They are not called by default but 
+are used in [Menus](Menus.md).
\ No newline at end of file