diff --git a/index.html b/index.html
index 902c8abfc..7a3a202be 100644
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+++ b/index.html
@@ -22,9 +22,9 @@
   <h4 class="text-black-50">A programming language for multilingual grammar applications</h4>
 </div>
 
-<div class="row my-4">
+<div class="row mt-4">
 
-  <div class="col-sm-6 col-md-3">
+  <div class="col-sm-6 col-md-3 mb-4">
     <h3>Get started</h3>
     <ul class="mb-2">
       <li><a href="https://www.youtube.com/watch?v=x1LFbDQhbso">Google Tech Talk</a></li>
@@ -48,7 +48,7 @@
     </a>
   </div>
 
-  <div class="col-sm-6 col-md-3">
+  <div class="col-sm-6 col-md-3 mb-4">
     <h3>Learn more</h3>
 
     <ul class="mb-2">
@@ -64,21 +64,24 @@
     </a>
   </div>
 
-  <div class="col-sm-6 col-md-3">
+  <div class="col-sm-6 col-md-3 mb-4">
     <h3>Develop</h3>
     <ul class="mb-2">
       <li><a href="doc/gf-developers.html">Developers Guide</a></li>
       <!-- <li><a href="/~hallgren/gf-experiment/browse/">Browse Source Code</a></li> -->
-      <li><a href="http://hackage.haskell.org/package/gf/docs/PGF.html">PGF library API (Haskell runtime)</a></li>
-      <li><a href="doc/runtime-api.html">PGF library API (C runtime)</a></li>
+      <li>PGF library API:<br>
+        <a href="http://hackage.haskell.org/package/gf/docs/PGF.html">Haskell</a> /
+        <a href="doc/runtime-api.html">C&nbsp;runtime</a>
+      </li>
       <li><a href="http://hackage.haskell.org/package/gf/docs/GF.html">GF compiler API</a></li>
       <!-- <li><a href="src/ui/android/README">GF on Android (new)</a></li>
       <li><a href="/android/">GF on Android (old) </a></li> -->
       <li><a href="doc/gf-editor-modes.html">Text Editor Support</a></li>
+      <li><a href="http://www.grammaticalframework.org/~john/rgl-browser/">RGL source browser</a></li>
     </ul>
   </div>
 
-  <div class="col-sm-6 col-md-3">
+  <div class="col-sm-6 col-md-3 mb-4">
     <h3>Contribute</h3>
     <ul class="mb-2">
       <li><a href="http://groups.google.com/group/gf-dev">Mailing List</a></li>
@@ -223,6 +226,10 @@ least one, it may help you to get a first idea of what GF is.
     <h2>News</h2>
 
     <dl class="row">
+      <dt class="col-sm-3 text-center text-nowrap">2020-03-29</dt>
+      <dd class="col-sm-9">
+        <a href="//school.grammaticalframework.org/2020/">Seventh GF Summer School</a> in Singapore has been postponed because of the corona pandemic.
+      </dd>
       <dt class="col-sm-3 text-center text-nowrap">2018-12-03</dt>
       <dd class="col-sm-9">
         <a href="//school.grammaticalframework.org/2018/">Sixth GF Summer School</a> in Stellenbosch (South Africa), 3–14 December 2018