diff --git a/sdrgui/mainwindow.ui b/sdrgui/mainwindow.ui
index 59f7dc4e6..48b117453 100644
--- a/sdrgui/mainwindow.ui
+++ b/sdrgui/mainwindow.ui
@@ -10,12 +10,6 @@
     <height>721</height>
    </rect>
   </property>
-  <property name="font">
-   <font>
-    <family>Sans Serif</family>
-    <pointsize>9</pointsize>
-   </font>
-  </property>
   <property name="windowTitle">
    <string>SDRangel</string>
   </property>
@@ -27,32 +21,12 @@
    <bool>true</bool>
   </property>
   <widget class="QWidget" name="centralWidget">
-   <property name="font">
-    <font>
-     <family>Sans Serif</family>
-    </font>
-   </property>
    <layout class="QVBoxLayout" name="verticalLayout_2">
-    <property name="leftMargin">
-     <number>0</number>
-    </property>
-    <property name="topMargin">
-     <number>0</number>
-    </property>
-    <property name="rightMargin">
-     <number>0</number>
-    </property>
-    <property name="bottomMargin">
+    <property name="margin">
      <number>0</number>
     </property>
     <item>
      <widget class="QTabWidget" name="tabSpectra">
-      <property name="font">
-       <font>
-        <family>Sans Serif</family>
-        <pointsize>9</pointsize>
-       </font>
-      </property>
       <property name="tabPosition">
        <enum>QTabWidget::East</enum>
       </property>
@@ -79,24 +53,12 @@
     </rect>
    </property>
    <widget class="QMenu" name="menu_File">
-    <property name="font">
-     <font>
-      <family>Sans Serif</family>
-      <pointsize>9</pointsize>
-     </font>
-    </property>
     <property name="title">
      <string>&amp;File</string>
     </property>
     <addaction name="action_Exit"/>
    </widget>
    <widget class="QMenu" name="menu_Devices">
-    <property name="font">
-     <font>
-      <family>Sans Serif</family>
-      <pointsize>9</pointsize>
-     </font>
-    </property>
     <property name="title">
      <string>&amp;DeviceSets</string>
     </property>
@@ -105,24 +67,12 @@
     <addaction name="action_removeLastDevice"/>
    </widget>
    <widget class="QMenu" name="menu_View">
-    <property name="font">
-     <font>
-      <family>Sans Serif</family>
-      <pointsize>9</pointsize>
-     </font>
-    </property>
     <property name="title">
      <string>&amp;View</string>
     </property>
     <addaction name="action_View_Fullscreen"/>
    </widget>
    <widget class="QMenu" name="menu_Help">
-    <property name="font">
-     <font>
-      <family>Sans Serif</family>
-      <pointsize>9</pointsize>
-     </font>
-    </property>
     <property name="title">
      <string>&amp;Help</string>
     </property>
@@ -131,12 +81,6 @@
     <addaction name="action_About"/>
    </widget>
    <widget class="QMenu" name="menu_Window">
-    <property name="font">
-     <font>
-      <family>Sans Serif</family>
-      <pointsize>9</pointsize>
-     </font>
-    </property>
     <property name="title">
      <string>&amp;Window</string>
     </property>
@@ -157,14 +101,7 @@
    <addaction name="menuPreferences"/>
    <addaction name="menu_Help"/>
   </widget>
-  <widget class="QStatusBar" name="statusBar">
-   <property name="font">
-    <font>
-     <family>Sans Serif</family>
-     <pointsize>9</pointsize>
-    </font>
-   </property>
-  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
   <widget class="QDockWidget" name="inputViewDock">
    <property name="windowTitle">
     <string>Sampling devices</string>
@@ -183,16 +120,7 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="leftMargin">
-      <number>2</number>
-     </property>
-     <property name="topMargin">
-      <number>2</number>
-     </property>
-     <property name="rightMargin">
-      <number>2</number>
-     </property>
-     <property name="bottomMargin">
+     <property name="margin">
       <number>2</number>
      </property>
      <item>
@@ -226,16 +154,7 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="leftMargin">
-      <number>2</number>
-     </property>
-     <property name="topMargin">
-      <number>2</number>
-     </property>
-     <property name="rightMargin">
-      <number>2</number>
-     </property>
-     <property name="bottomMargin">
+     <property name="margin">
       <number>2</number>
      </property>
      <item>
@@ -272,16 +191,7 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="leftMargin">
-      <number>2</number>
-     </property>
-     <property name="topMargin">
-      <number>2</number>
-     </property>
-     <property name="rightMargin">
-      <number>2</number>
-     </property>
-     <property name="bottomMargin">
+     <property name="margin">
       <number>2</number>
      </property>
      <item>
@@ -306,16 +216,7 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="leftMargin">
-      <number>2</number>
-     </property>
-     <property name="topMargin">
-      <number>2</number>
-     </property>
-     <property name="rightMargin">
-      <number>2</number>
-     </property>
-     <property name="bottomMargin">
+     <property name="margin">
       <number>2</number>
      </property>
      <item>
@@ -539,16 +440,7 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="leftMargin">
-      <number>2</number>
-     </property>
-     <property name="topMargin">
-      <number>2</number>
-     </property>
-     <property name="rightMargin">
-      <number>2</number>
-     </property>
-     <property name="bottomMargin">
+     <property name="margin">
       <number>2</number>
      </property>
      <item>
@@ -576,16 +468,7 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="leftMargin">
-      <number>2</number>
-     </property>
-     <property name="topMargin">
-      <number>2</number>
-     </property>
-     <property name="rightMargin">
-      <number>2</number>
-     </property>
-     <property name="bottomMargin">
+     <property name="margin">
       <number>2</number>
      </property>
      <item>
@@ -768,9 +651,6 @@
    <property name="text">
     <string>E&amp;xit</string>
    </property>
-   <property name="font">
-    <font/>
-   </property>
    <property name="shortcut">
     <string>Ctrl+Q</string>
    </property>
@@ -804,9 +684,6 @@
    <property name="text">
     <string>&amp;Fullscreen</string>
    </property>
-   <property name="font">
-    <font/>
-   </property>
    <property name="shortcut">
     <string>F11</string>
    </property>
@@ -826,9 +703,6 @@
    <property name="text">
     <string>&amp;About SDRangel...</string>
    </property>
-   <property name="font">
-    <font/>
-   </property>
   </action>
   <action name="action_Preferences">
    <property name="text">
@@ -842,17 +716,11 @@
    <property name="text">
     <string>Loaded &amp;Plugins...</string>
    </property>
-   <property name="font">
-    <font/>
-   </property>
   </action>
   <action name="action_addSourceDevice">
    <property name="text">
     <string>Add source device set</string>
    </property>
-   <property name="font">
-    <font/>
-   </property>
   </action>
   <action name="action_removeLastDevice">
    <property name="text">