Added a missing screencap, fixme

include/devices-using-mackielogic-control-protocol.html

@@ -11,14 +11,25 @@
 <h2>Enabling Mackie Control in Ardour</h2>
 <p>
   Navigate to <kbd class="menu">Edit &gt; Preferences &gt; Control Surfaces</kbd>.
-  Double-click on <kbd class="menu">Mackie Control</kbd> to see the setup dialog:
+  Tick the <kbd class="option">Mackie</kbd> option and click on the
+  <kbd class="menu">Show Protocol Settings</kbd> button to see the setup dialog:
 </p>
-<img src="" alt="Mackie Control Setup Dialog" />
+
+<figure>
+  <img src="/images/mackie-control-protocol-settings.png" alt="The Mackie Control Setup Dialog">
+  <figcaption>
+    The Mackie Control Setup Dialog
+  </figcaption>
+</figure>
+
 <p>
   From the selector at the top, choose the type of device you are using.
   (<a href="@@what-to-do-if-your-device-is-not-listed">
   What to do if your device is not listed</a>).
 </p>
+
+<p class="fixme">Update the controls description</p>
+
 <p>
   Once your setup is complete, click "OK" to close the dialog. Now click
   on the enable checkbox for "Mackie Control".
@@ -48,7 +59,7 @@
 <h2>Customizing your control surface</h2>
 <p>
   Every possible global Mackie Control button can be bound to any <a
-  href="/appendix/menu-actions-list/">
+  href="@@list-of-menu-actions">
   action</a> present in Ardour's GUI. Please check your control surface
   page for suggestions.
 </p>