diff --git a/README.mdown b/README.mdown
index c840b6a..af5630e 100644
--- a/README.mdown
+++ b/README.mdown
@@ -30,6 +30,8 @@ Jordi Boggiano - <j.boggiano@seld.be><br />
 Changelog
 ---------
 
+- 1.1.0
+  - Added a toggle button to expand/collapse all krumo sub-trees at once
 - 1.0.0
   - Initial Public Release
 
diff --git a/php-console.js b/php-console.js
index cdf441f..94300f4 100644
--- a/php-console.js
+++ b/php-console.js
@@ -55,4 +55,16 @@ $(function() {
             $('textarea[name="code"]').focus();
         }
     });
+
+    // adds a toggle button to expand/collapse all krumo sub-trees at once
+    if ($('.krumo-expand').length > 0) {
+        $('<a class="expand" href="#">Toggle all</a>')
+            .click(function(e) {
+                $('div.krumo-element.krumo-expand').each(function(idx, el) {
+                    krumo.toggle(el);
+                });
+                e.preventDefault();
+            })
+            .prependTo('.output');
+    }
 });
diff --git a/styles.css b/styles.css
index 5b0af32..4976889 100644
--- a/styles.css
+++ b/styles.css
@@ -20,6 +20,10 @@ input {
     font-size: 20px;
 }
 
+a {
+    color: #88f;
+}
+
 .output {
     padding: 5px 10px;
     margin: 10px .4%;