diff --git a/include/working-with-ardour-built-plugin-editors.html b/include/working-with-ardour-built-plugin-editors.html
index 811b627..64a103e 100644
--- a/include/working-with-ardour-built-plugin-editors.html
+++ b/include/working-with-ardour-built-plugin-editors.html
@@ -74,3 +74,17 @@
   change the vertical scale of the graphs.
 </p>
 
+<h2>MIDI instruments specificities</h2>
+
+<figure>
+  <img src="/images/instrument_plugins-keyboard.png" alt="The MIDI keyboard in instruments plugins">
+  <figcaption>
+    The MIDI keyboard in instruments plugins
+  </figcaption>
+</figure>
+
+<p>
+  The generic UI provides, for all MIDI instruments plugins, a keyboard, that can
+  be used either with the mouse, or by using a QWERTY keyboard as a piano. Both the
+  channel and the velocity can be set above the keyboard.
+</p>