--- a/src/qtgui/preview/preview.ui
+++ b/src/qtgui/preview/preview.ui
@@ -35,7 +35,7 @@
         </property>
         <widget class="QLayoutWidget">
             <property name="name">
-                <cstring>layout9</cstring>
+                <cstring>layout4</cstring>
             </property>
             <vbox>
                 <property name="name">
@@ -75,7 +75,7 @@
                 </widget>
                 <widget class="QLayoutWidget">
                     <property name="name">
-                        <cstring>layout7</cstring>
+                        <cstring>layout3</cstring>
                     </property>
                     <hbox>
                         <property name="name">
@@ -107,6 +107,9 @@
                             <property name="name">
                                 <cstring>nextButton</cstring>
                             </property>
+                            <property name="enabled">
+                                <bool>false</bool>
+                            </property>
                             <property name="text">
                                 <string>&amp;Next</string>
                             </property>
@@ -118,11 +121,25 @@
                             <property name="name">
                                 <cstring>prevButton</cstring>
                             </property>
+                            <property name="enabled">
+                                <bool>false</bool>
+                            </property>
                             <property name="text">
                                 <string>&amp;Previous</string>
                             </property>
                             <property name="accel">
                                 <string>Alt+P</string>
+                            </property>
+                        </widget>
+                        <widget class="QPushButton">
+                            <property name="name">
+                                <cstring>clearPB</cstring>
+                            </property>
+                            <property name="enabled">
+                                <bool>false</bool>
+                            </property>
+                            <property name="text">
+                                <string>Clear</string>
                             </property>
                         </widget>
                         <widget class="QCheckBox">
@@ -160,6 +177,12 @@
         <signal>clicked()</signal>
         <receiver>Preview</receiver>
         <slot>prevPressed()</slot>
+    </connection>
+    <connection>
+        <sender>clearPB</sender>
+        <signal>clicked()</signal>
+        <receiver>searchTextLine</receiver>
+        <slot>clear()</slot>
     </connection>
 </connections>
 <includes>