diff --git a/USER_MANUAL.html b/USER_MANUAL.html
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--- a/USER_MANUAL.html
+++ b/USER_MANUAL.html
@@ -622,6 +622,7 @@ FMA             -       Supports FMA extensions using YMM state</code></pre>
 <li>Set minimum size for Mode box to 250px. (PR #446)</li>
 <li>Notify FreeDV Reporter if only capable of RX. (PR #449)</li>
 <li>Hamlib: allow frequency and mode changes during TX. (PR #455)</li>
+<li>Auto-size columns in Audio Options to improve readability. (PR #461)</li>
 </ul></li>
 <li>Build system:
 <ul>
diff --git a/USER_MANUAL.pdf b/USER_MANUAL.pdf
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