diff --git a/mainwindow.ui b/mainwindow.ui
index 12b036aaf..8373de99d 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -838,7 +838,7 @@ QLabel[oob="true"] {
                    <item>
                     <widget class="QCheckBox" name="cbTxLock">
                      <property name="toolTip">
-                      <string>Tx frequency tracks Rx frequency</string>
+                      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Tx frequency tracks Rx frequency. &lt;/p&gt;&lt;p&gt;Not recommeded for general use!&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
                      </property>
                      <property name="text">
                       <string>Lock Tx=Rx</string>
@@ -975,7 +975,7 @@ QLabel[oob=&quot;true&quot;] {
                  <item row="1" column="0">
                   <widget class="QCheckBox" name="txFirstCheckBox">
                    <property name="toolTip">
-                    <string>Check to Tx in even minutes, uncheck for odd minutes</string>
+                    <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Check to Tx in even periods, uncheck for odd periods&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
                    </property>
                    <property name="text">
                     <string>Tx even/1st</string>
diff --git a/shortcuts.txt b/shortcuts.txt
index f6b35e66a..f516ad400 100644
--- a/shortcuts.txt
+++ b/shortcuts.txt
@@ -3,7 +3,7 @@
   <tr><td><b>Ctrl+F1  </b></td><td>About WSJT-X</td></tr>
   <tr><td><b>F2       </b></td><td>Open settings window</td></tr>
   <tr><td><b>F3       </b></td><td>Display keyboard shortcuts</td></tr>
-  <tr><td><b>F4       </b></td><td>Clear DX Call, DX Grid, Tx messages 1-5</td></tr>
+  <tr><td><b>F4       </b></td><td>Clear DX Call, DX Grid, Tx messages 1-4</td></tr>
   <tr><td><b>Alt+F4   </b></td><td>Exit program</td></tr>
   <tr><td><b>F5       </b></td><td>Display special mouse commands</td></tr>
   <tr><td><b>F6       </b></td><td>Open next file in directory</td></tr>