diff --git a/mainwindow.ui b/mainwindow.ui
index 5188054..935290c 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -261,6 +261,9 @@
                     <property name="cursor">
                      <cursorShape>PointingHandCursor</cursorShape>
                     </property>
+                    <property name="toolTip">
+                     <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Adjust VFO frequency up&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+                    </property>
                     <property name="autoFillBackground">
                      <bool>false</bool>
                     </property>
@@ -297,6 +300,9 @@ QPushButton:pressed {
                     <property name="cursor">
                      <cursorShape>PointingHandCursor</cursorShape>
                     </property>
+                    <property name="toolTip">
+                     <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Adjust VFO frequency down&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+                    </property>
                     <property name="autoFillBackground">
                      <bool>false</bool>
                     </property>