diff --git a/d2js/js/examples/customizable.html b/d2js/js/examples/customizable.html
index 8da30c086..561ea59e2 100644
--- a/d2js/js/examples/customizable.html
+++ b/d2js/js/examples/customizable.html
@@ -109,14 +109,14 @@
         <div class="center-toggle">
           <label class="checkbox-label">
             <input type="checkbox" id="center" />
-            Center mode
+            Centered
           </label>
         </div>
         <div class="theme-select">
           <label class="select-label">
             <select id="theme" name="theme">
               <option value="-1"></option>
-              <option value="0">Default</option>
+              <option selected value="0">Default</option>
               <option value="1">Neutral grey</option>
               <option value="3">Flagship Terrastruct</option>
               <option value="4">Cool classics</option>