diff --git a/docs/servo_power_test/index.css b/docs/servo_power_test/index.css
index f9ae11b5e..4cccbc3ca 100644
--- a/docs/servo_power_test/index.css
+++ b/docs/servo_power_test/index.css
@@ -158,7 +158,6 @@ body {
 }
 
 #backlog {
-  margin-top: 1rem;
   width: 25%;
   padding: 0;
   box-sizing: border-box;
@@ -169,10 +168,10 @@ body {
 #backlog span {
   display: inline-block;
   border: 1px solid #aaa;
-  padding: 1rem;
+  padding: 16px;
   width: auto;
   min-height: 100px;
-  height: 300px;
+  height: 448px;
   font-family: monospace;
   white-space: pre-wrap;
   word-wrap: break-word;
@@ -189,6 +188,7 @@ body {
   width: 75%;
   left: 0;
   right: 0;
+  margin: 0;
 }
 
 #popup-overlay {
diff --git a/docs/servo_power_test/index.html b/docs/servo_power_test/index.html
index 114f9b14c..649343b70 100644
--- a/docs/servo_power_test/index.html
+++ b/docs/servo_power_test/index.html
@@ -18,12 +18,12 @@
     <button id='halt-button'>Cancel</button>
     <button id='download-button'>Download</button>
     <span>number of iterations: <input id="iteration-input" type="number" placeholder="1"></span>
+    <span>margin: <input id="margin-time-input" type="number" value="300" autocomplete="off" />ms</span>
   </div>
   <div id="config">
     <button id="add-config-button">Add config</button>
     <ul id="shell-script-list"></ul>
   </div>
-  <p>margin: <input id="margin-time-input" type="number" value="300" autocomplete="off" />ms</p>
   <div id="total-histogram"></div>
   <div class="flex">
     <p>current iteration: </p>