diff --git a/src/calibre/gui2/preferences/look_feel.ui b/src/calibre/gui2/preferences/look_feel.ui
index baa4a30b29..e7047da486 100644
--- a/src/calibre/gui2/preferences/look_feel.ui
+++ b/src/calibre/gui2/preferences/look_feel.ui
@@ -193,8 +193,11 @@
        </item>
        <item row="6" column="0">
         <widget class="QCheckBox" name="opt_disable_tray_notification">
+         <property name="toolTip">
+          <string>Disable popup notifications when calibre completes jobs such a conversion, sending to device etc. The notifications are sent via the operating system notification facility, if available.</string>
+         </property>
          <property name="text">
-          <string>Disable n&amp;otifications in system tray</string>
+          <string>Disable n&amp;otifications on job completion</string>
          </property>
         </widget>
        </item>
@@ -252,7 +255,7 @@
        <item row="4" column="0">
         <widget class="QLabel" name="label_hidpi">
          <property name="text">
-          <string>&amp;Adjust for high resolution screens (needs restart):</string>
+          <string>Ad&amp;just for high resolution screens (needs restart):</string>
          </property>
          <property name="buddy">
           <cstring>opt_hidpi</cstring>