updated the panners screenshots

include/mono-panner.html

@@ -7,15 +7,24 @@ default, the panner is centered.
 
 <h2>Mono Panner User Interface</h2>
 
-<img src="/images/mono-panner-annotated.png" alt="image of the mono panner"/>
+<figure class="left">
+    <img src="/images/mono-panner.png" alt="The mono panner">
+    <figcaption>
+      The mono panner
+    </figcaption>
+</figure>
 
-<p class="note">
-  The mono panner looks a quite similar to the
-  <a href="@@stereo-panner">stereo panner</a>
+
+<p>
+  The mono panner looks quite similar to the <a href="@@stereo-panner">stereo panner</a>
   interface. The difference is that the L/R labels in the lower half
   of the mono panner do not move because there is no "width" to
   control.
 </p>
+<p>
+  On the adjacent picture, the panner is centered, as shown by the central
+  position of the slider, called <dfn>position indicator</dfn>.
+</p>
 
 <h2>Using the mouse</h2>
 
@@ -74,4 +83,3 @@ wheel may be used as follows:
   <tr><th><kbd class="mod1 mouse">&dArr;</kbd> or <kbd class="mod1 mouse">&rArr;</kbd></th>
   <td>move position to the right by 5&deg;</td></tr>
 </table>
-

include/stereo-panner.html

@@ -19,7 +19,13 @@
 
 <h2>Stereo Panner User Interface</h2>
 
-<img src="/images/stereo-panner-annotated.png" alt=""/>
+<figure class="left">
+  <img src="/images/stereo-panner.png" alt="The Stereo Panner">
+  <figcaption>
+    The Stereo Panner
+  </figcaption>
+</figure>
+
 <p>
   The <dfn>panner user interface</dfn> consists of three elements, divided between
   the top and bottom half. Click and/or drag in the top half to
@@ -55,7 +61,7 @@
   a pair of numbers that will be familiar to most audio engineers.
 </p>
 
-<table>
+<table class="nodl">
 <tr><th>Position</th><th>L/R</th><th>English</th></tr>
 <tr><td>0</td><td>L=50% R=50%</td><td>signal image is midway between
     left and right speakers</td></tr>
@@ -74,7 +80,7 @@
 
 <h3>Examples In Use</h3>
 
-<table>
+<table class="nodl">
 <tr><th>Appearance</th><th>Settings</th></tr>
 <tr><td><img src="/images/stereo-panner.png"></td><td>Width=100%,
     L=50 R=50</td></tr>
@@ -241,4 +247,3 @@ some degree of comb filtering may be acceptable. Then again, it may not. Listen
 carefully for artefacts if you manipulate unknown stereo signals&mdash;many
 orchestra sample libraries for example do contain time-delay components.
 </p>
-