diff --git a/docs/index.html b/docs/index.html
index d7615df36..059a2defe 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -3379,7 +3379,9 @@ Ms Pac-Man (Stella extended codes):
     <tr>
       <td VALIGN="TOP"><i>Display.YStart:</i></td>
       <td>Indicates the scan-line to start displaying at.
-      The value must be <i>n</i> such that 0 &lt;= <i>n</i> &lt;= 64.</td>
+      The value must be <i>n</i> such that 0 &lt;= <i>n</i> &lt;= 64.
+      Setting <i>n</i> to zero will enable ystart autodetection, which
+      should work fine for the vast majority of ROMs.</td>
     </tr>
 
     <tr>