diff --git a/src/calibre/gui2/convert/azw3_output.ui b/src/calibre/gui2/convert/azw3_output.ui
index 537838ffee..6f9da8a64d 100644
--- a/src/calibre/gui2/convert/azw3_output.ui
+++ b/src/calibre/gui2/convert/azw3_output.ui
@@ -13,24 +13,14 @@
   <property name="windowTitle">
    <string>Form</string>
   </property>
-  <layout class="QGridLayout" name="gridLayout">
-   <item row="6" column="0">
-    <spacer name="verticalSpacer_2">
-     <property name="orientation">
-      <enum>Qt::Vertical</enum>
-     </property>
-     <property name="sizeHint" stdset="0">
-      <size>
-       <width>20</width>
-       <height>40</height>
-      </size>
-     </property>
-    </spacer>
-   </item>
-   <item row="3" column="0" colspan="2">
-    <widget class="QCheckBox" name="opt_prefer_author_sort">
+  <layout class="QFormLayout" name="formLayout">
+   <property name="fieldGrowthPolicy">
+    <enum>QFormLayout::ExpandingFieldsGrow</enum>
+   </property>
+   <item row="0" column="0" colspan="2">
+    <widget class="QCheckBox" name="opt_no_inline_toc">
      <property name="text">
-      <string>Use author &amp;sort for author</string>
+      <string>Do not add &amp;Table of Contents to book</string>
      </property>
     </widget>
    </item>
@@ -44,19 +34,8 @@
      </property>
     </widget>
    </item>
-   <item row="5" column="0">
-    <widget class="QCheckBox" name="opt_share_not_sync">
-     <property name="text">
-      <string>Enable &amp;sharing of book content via Facebook, etc. WARNING: Disables last read syncing</string>
-     </property>
-    </widget>
-   </item>
-   <item row="0" column="0">
-    <widget class="QCheckBox" name="opt_no_inline_toc">
-     <property name="text">
-      <string>Do not add &amp;Table of Contents to book</string>
-     </property>
-    </widget>
+   <item row="1" column="1">
+    <widget class="QLineEdit" name="opt_toc_title"/>
    </item>
    <item row="2" column="0" colspan="2">
     <widget class="QCheckBox" name="opt_mobi_toc_at_start">
@@ -65,16 +44,27 @@
      </property>
     </widget>
    </item>
-   <item row="1" column="1">
-    <widget class="QLineEdit" name="opt_toc_title"/>
+   <item row="3" column="0" colspan="2">
+    <widget class="QCheckBox" name="opt_prefer_author_sort">
+     <property name="text">
+      <string>Use author &amp;sort for author</string>
+     </property>
+    </widget>
    </item>
-   <item row="4" column="0">
+   <item row="4" column="0" colspan="2">
     <widget class="QCheckBox" name="opt_dont_compress">
      <property name="text">
       <string>Disable &amp;compression of the file contents</string>
      </property>
     </widget>
    </item>
+   <item row="5" column="0" colspan="2">
+    <widget class="QCheckBox" name="opt_share_not_sync">
+     <property name="text">
+      <string>Enable &amp;sharing of book content via Facebook, etc. WARNING: Disables last read syncing</string>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <resources/>