+<h3>Position vs. L/R</h3>
+
+<p>
+ Although the implementation of the panner uses the "position"
+ parameter, when the user interface displays it numerically, it shows a pair of numbers that
+ will be familiar to most audio engineers.
+</p>
+
+<table>
+<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>
+
+<tr><td>-1</td><td>L=100% R=0%</td><td>signal image is entirely
+ at the left speaker </td></tr>
+
+<tr><td>1</td><td>L=0% R=100%</td><td>signal image is entirely
+ at the right speaker</td></tr>
+</table>
+
+<p>
+One way to remember this sort of convention is that the middle of the
+USA is not Kansas, but "Los Angeles: 50% New York: 50%".
+</p>
+
+<h2>Examples In Use</h2>
+
+<table>
+<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>
+<tr><td><img src="/images/stereo-panner-zero.png"></td><td>Width=0%,
+ L=50 R=50</td></tr>
+<tr><td><img src="/images/stereo-panner-inverted.png"></td><td>Width=-100%, Position = 0 (center)</td></tr>
+<tr><td><img src="/images/stereo-panner-right.png"></td><td>Width=36%,
+ L=44 R=56</td></tr>
+<tr><td><img src="/images/stereo-panner-hard-right.png"></td><td>Width=0%,
+ L=0 R=100</td></tr>
+</table>
+
+<h2>Using the mouse</h2>