diff --git a/static/git-arr.css b/static/git-arr.css
index b0f2de5..57bf13c 100644
--- a/static/git-arr.css
+++ b/static/git-arr.css
@@ -124,6 +124,12 @@ span.age-band2 {
     color: seagreen;
 }
 
+/* Toggable titles */
+div.toggable-title {
+    font-weight: bold;
+    margin-bottom: 0.3em;
+}
+
 /* Commit message and diff. */
 pre.commit-message {
     font-size: large;
diff --git a/static/git-arr.js b/static/git-arr.js
index d1e3b81..d39ca72 100644
--- a/static/git-arr.js
+++ b/static/git-arr.js
@@ -61,3 +61,13 @@ function replace_timestamps() {
         }
     }
 }
+
+function toggle(id) {
+    var e = document.getElementById(id);
+
+    if (e.style.display == "") {
+        e.style.display = "none"
+    } else if (e.style.display == "none") {
+        e.style.display = ""
+    }
+}
diff --git a/views/commit-list.html b/views/commit-list.html
index 3af9838..94f1dd0 100644
--- a/views/commit-list.html
+++ b/views/commit-list.html
@@ -16,7 +16,7 @@
 %     end
 % end
 
-<table class="nice commits">
+<table class="nice commits" id="commits">
 
 % refs = repo.refs()
 % if not defined("commits"):
diff --git a/views/summary.html b/views/summary.html
index 652ee6e..d3388e6 100644
--- a/views/summary.html
+++ b/views/summary.html
@@ -5,6 +5,7 @@
 <link rel="stylesheet" type="text/css" href="../../static/git-arr.css"/>
 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
 <meta name=viewport content="width=device-width, initial-scale=1">
+<script async src="../../static/git-arr.js"></script>
 </head>
 
 <body class="summary">
@@ -35,23 +36,25 @@
 % end
 
 % if "master" in repo.branch_names():
-<b><a href="b/master/t/">[master]</a> /</b><br/>
-%     kwargs = dict(repo = repo, tree=repo.tree("master"),
-%                   treeroot="b/master/t", dirname=smstr.from_url(""))
-%     include tree-list **kwargs
-<hr/>
+<div class="toggable-title" onclick="toggle('commits')">
+  <a href="b/master/">commits (master)</a>
+</div>
 %     kwargs = dict(repo = repo, start_ref = "refs/heads/master",
 %                   limit = repo.info.commits_in_summary,
 %                   shorten = shorten, repo_root = ".", offset = 0)
 %     include commit-list **kwargs
 <hr/>
+<div class="toggable-title" onclick="toggle('ls')">
+  <a href="b/master/t/">tree (master)</a>
+</div>
+%     kwargs = dict(repo = repo, tree=repo.tree("master"),
+%                   treeroot="b/master/t", dirname=smstr.from_url(""))
+%     include tree-list **kwargs
+<hr/>
 % end
 
-<table class="nice">
-    <tr>
-        <th>branches</th>
-    </tr>
-
+<div class="toggable-title" onclick="toggle('branches')">branches</div>
+<table class="nice toggable" id="branches">
     % for b in repo.branch_names():
     <tr>
         <td class="main"><a href="b/{{b}}/">{{b}}</a></td>
@@ -67,11 +70,8 @@
 
 % tags = list(repo.tags())
 % if tags:
-<table class="nice">
-    <tr>
-        <th>tags</th>
-    </tr>
-
+<div class="toggable-title" onclick="toggle('tags')">tags</div>
+<table class="nice toggable" id="tags">
     % for name, obj_id in tags:
     <tr>
         <td><a href="c/{{obj_id}}/">{{name}}</a></td>
diff --git a/views/tree-list.html b/views/tree-list.html
index 5eea1aa..70f032a 100644
--- a/views/tree-list.html
+++ b/views/tree-list.html
@@ -1,4 +1,4 @@
-<table class="nice ls">
+<table class="nice toggable ls" id="ls">
 % key_func = lambda (t, n, s): (t != 'tree', n.raw)
 % for type, name, size in sorted(tree.ls(dirname.raw), key = key_func):
     <tr class="{{type}}">
