diff --git a/handbook/troggle/trogintro.html b/handbook/troggle/trogintro.html
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--- a/handbook/troggle/trogintro.html
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@@ -13,12 +13,16 @@
 <p>Troggle is the software which runs the the expo cave survey data management and website. 
 
 <ul>
+<li>Troggle <a href="/signup">Signup for next Expo</a> for new people
 <li>Troggle <a href="training/trogbegin.html">initial training: for complete beginners</a>
 <li>For day to day cave survey work on the expo laptop, see: the expo <a href="../survey/newcave.html">survey handbook</a> (not the place to start learning)
 <li>For what you can do with troggle: <a href="trogreports.html">expo data management with troggle reports</a>.
 <li>For data management using your laptop: set up <a href="../computing/basiclaptop.html">your own laptop</a>.
 <li>For the history of expo use of computers, see: <a href="../website-history.html">website and troggle history</a>.
 <li>For system maintenance, see: the <a href="../troggle/trogmanual.html">system maintainers manual</a>.
+<li>Troggle <a href="/accounts/newregister/">new user registration</a> for new users
+<li>Troggle <a href="/accounts/register/">old user registration</a> for people who have already been on expo
+
 </ul>
 
 <h3 id="what">Troggle - what it does</a></h3>