diff --git a/plugins/channel/am/amdemodgui.ui b/plugins/channel/am/amdemodgui.ui
index 536ff29c0..cec584538 100644
--- a/plugins/channel/am/amdemodgui.ui
+++ b/plugins/channel/am/amdemodgui.ui
@@ -10,6 +10,12 @@
     <height>143</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="focusPolicy">
    <enum>Qt::StrongFocus</enum>
   </property>
diff --git a/plugins/channel/bfm/bfmdemodgui.ui b/plugins/channel/bfm/bfmdemodgui.ui
index 77480be03..559b3277d 100644
--- a/plugins/channel/bfm/bfmdemodgui.ui
+++ b/plugins/channel/bfm/bfmdemodgui.ui
@@ -10,6 +10,12 @@
     <height>729</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Broadcast FM Demod</string>
   </property>
@@ -444,7 +450,14 @@
      <number>2</number>
     </property>
     <item>
-     <widget class="GLSpectrum" name="glSpectrum" native="true"/>
+     <widget class="GLSpectrum" name="glSpectrum" native="true">
+      <property name="font">
+       <font>
+        <family>Sans Serif</family>
+        <pointsize>9</pointsize>
+       </font>
+      </property>
+     </widget>
     </item>
     <item>
      <widget class="GLSpectrumGUI" name="spectrumGUI" native="true"/>
diff --git a/plugins/channel/lora/lorademodgui.ui b/plugins/channel/lora/lorademodgui.ui
index 214b085e2..e779a7a71 100644
--- a/plugins/channel/lora/lorademodgui.ui
+++ b/plugins/channel/lora/lorademodgui.ui
@@ -10,6 +10,12 @@
     <height>410</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>LoRa Demodulator</string>
   </property>
@@ -26,7 +32,16 @@
     <string>Settings</string>
    </property>
    <layout class="QGridLayout" name="gridLayout">
-    <property name="margin">
+    <property name="leftMargin">
+     <number>2</number>
+    </property>
+    <property name="topMargin">
+     <number>2</number>
+    </property>
+    <property name="rightMargin">
+     <number>2</number>
+    </property>
+    <property name="bottomMargin">
      <number>2</number>
     </property>
     <property name="spacing">
@@ -134,7 +149,16 @@
     <property name="spacing">
      <number>2</number>
     </property>
-    <property name="margin">
+    <property name="leftMargin">
+     <number>3</number>
+    </property>
+    <property name="topMargin">
+     <number>3</number>
+    </property>
+    <property name="rightMargin">
+     <number>3</number>
+    </property>
+    <property name="bottomMargin">
      <number>3</number>
     </property>
     <item>
@@ -145,6 +169,12 @@
         <height>150</height>
        </size>
       </property>
+      <property name="font">
+       <font>
+        <family>Sans Serif</family>
+        <pointsize>9</pointsize>
+       </font>
+      </property>
      </widget>
     </item>
     <item>
@@ -154,6 +184,12 @@
   </widget>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>RollupWidget</class>
+   <extends>QWidget</extends>
+   <header>gui/rollupwidget.h</header>
+   <container>1</container>
+  </customwidget>
   <customwidget>
    <class>GLSpectrum</class>
    <extends>QWidget</extends>
@@ -166,12 +202,6 @@
    <header>gui/glspectrumgui.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>RollupWidget</class>
-   <extends>QWidget</extends>
-   <header>gui/rollupwidget.h</header>
-   <container>1</container>
-  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/channel/nfm/nfmdemodgui.ui b/plugins/channel/nfm/nfmdemodgui.ui
index 8bd445743..1fb12e3b7 100644
--- a/plugins/channel/nfm/nfmdemodgui.ui
+++ b/plugins/channel/nfm/nfmdemodgui.ui
@@ -10,6 +10,12 @@
     <height>162</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>NFM Demodulator</string>
   </property>
diff --git a/plugins/channel/tcpsrc/tcpsrcgui.ui b/plugins/channel/tcpsrc/tcpsrcgui.ui
index fc9a96d96..15287bf8e 100644
--- a/plugins/channel/tcpsrc/tcpsrcgui.ui
+++ b/plugins/channel/tcpsrc/tcpsrcgui.ui
@@ -10,6 +10,12 @@
     <height>443</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>TCP Sample Source</string>
   </property>
@@ -351,7 +357,14 @@
      <number>2</number>
     </property>
     <item>
-     <widget class="GLSpectrum" name="glSpectrum" native="true"/>
+     <widget class="GLSpectrum" name="glSpectrum" native="true">
+      <property name="font">
+       <font>
+        <family>Sans Serif</family>
+        <pointsize>9</pointsize>
+       </font>
+      </property>
+     </widget>
     </item>
     <item>
      <widget class="GLSpectrumGUI" name="spectrumGUI" native="true"/>
@@ -414,6 +427,12 @@
   </widget>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>RollupWidget</class>
+   <extends>QWidget</extends>
+   <header>gui/rollupwidget.h</header>
+   <container>1</container>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
@@ -432,12 +451,6 @@
    <header>gui/glspectrumgui.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>RollupWidget</class>
-   <extends>QWidget</extends>
-   <header>gui/rollupwidget.h</header>
-   <container>1</container>
-  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>sampleFormat</tabstop>
diff --git a/plugins/channel/tetra/tetrademodgui.ui b/plugins/channel/tetra/tetrademodgui.ui
index feaef1084..620dae5a9 100644
--- a/plugins/channel/tetra/tetrademodgui.ui
+++ b/plugins/channel/tetra/tetrademodgui.ui
@@ -7,9 +7,15 @@
     <x>0</x>
     <y>0</y>
     <width>200</width>
-    <height>179</height>
+    <height>184</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
@@ -17,7 +23,16 @@
    <property name="spacing">
     <number>3</number>
    </property>
-   <property name="margin">
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
     <number>0</number>
    </property>
    <item>
diff --git a/plugins/channel/udpsrc/udpsrcgui.ui b/plugins/channel/udpsrc/udpsrcgui.ui
index abe8589b8..954bb28c5 100644
--- a/plugins/channel/udpsrc/udpsrcgui.ui
+++ b/plugins/channel/udpsrc/udpsrcgui.ui
@@ -10,6 +10,12 @@
     <height>324</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>UDP Sample Source</string>
   </property>
@@ -491,7 +497,14 @@
      <number>2</number>
     </property>
     <item>
-     <widget class="GLSpectrum" name="glSpectrum" native="true"/>
+     <widget class="GLSpectrum" name="glSpectrum" native="true">
+      <property name="font">
+       <font>
+        <family>Sans Serif</family>
+        <pointsize>9</pointsize>
+       </font>
+      </property>
+     </widget>
     </item>
     <item>
      <widget class="GLSpectrumGUI" name="spectrumGUI" native="true"/>
@@ -500,6 +513,12 @@
   </widget>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>RollupWidget</class>
+   <extends>QWidget</extends>
+   <header>gui/rollupwidget.h</header>
+   <container>1</container>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
@@ -518,12 +537,6 @@
    <header>gui/glspectrumgui.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>RollupWidget</class>
-   <extends>QWidget</extends>
-   <header>gui/rollupwidget.h</header>
-   <container>1</container>
-  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>sampleFormat</tabstop>
diff --git a/plugins/channel/wfm/wfmdemodgui.ui b/plugins/channel/wfm/wfmdemodgui.ui
index 05094c804..47c29a935 100644
--- a/plugins/channel/wfm/wfmdemodgui.ui
+++ b/plugins/channel/wfm/wfmdemodgui.ui
@@ -10,6 +10,12 @@
     <height>399</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>WFM Demodulator</string>
   </property>
diff --git a/sdrbase/gui/aboutdialog.ui b/sdrbase/gui/aboutdialog.ui
index 14fd73c89..bc7a5a41b 100644
--- a/sdrbase/gui/aboutdialog.ui
+++ b/sdrbase/gui/aboutdialog.ui
@@ -10,6 +10,12 @@
     <height>602</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>About SDRangel</string>
   </property>
diff --git a/sdrbase/gui/addpresetdialog.ui b/sdrbase/gui/addpresetdialog.ui
index cbd6b5f5c..66a3d765d 100644
--- a/sdrbase/gui/addpresetdialog.ui
+++ b/sdrbase/gui/addpresetdialog.ui
@@ -10,6 +10,12 @@
     <height>204</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Dialog</string>
   </property>
diff --git a/sdrbase/gui/basicchannelsettingswidget.ui b/sdrbase/gui/basicchannelsettingswidget.ui
index d8c61ff18..cb8b25500 100644
--- a/sdrbase/gui/basicchannelsettingswidget.ui
+++ b/sdrbase/gui/basicchannelsettingswidget.ui
@@ -7,14 +7,29 @@
     <x>0</x>
     <y>0</y>
     <width>149</width>
-    <height>116</height>
+    <height>156</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Title &amp; Color</string>
   </property>
   <layout class="QGridLayout" name="gridLayout">
-   <property name="margin">
+   <property name="leftMargin">
+    <number>2</number>
+   </property>
+   <property name="topMargin">
+    <number>2</number>
+   </property>
+   <property name="rightMargin">
+    <number>2</number>
+   </property>
+   <property name="bottomMargin">
     <number>2</number>
    </property>
    <property name="spacing">
diff --git a/sdrbase/gui/pluginsdialog.ui b/sdrbase/gui/pluginsdialog.ui
index de2ad4976..1f87c6d1b 100644
--- a/sdrbase/gui/pluginsdialog.ui
+++ b/sdrbase/gui/pluginsdialog.ui
@@ -10,6 +10,12 @@
     <height>300</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Loaded Plugins</string>
   </property>
diff --git a/sdrbase/gui/preferencesdialog.ui b/sdrbase/gui/preferencesdialog.ui
index 054593132..faf70193b 100644
--- a/sdrbase/gui/preferencesdialog.ui
+++ b/sdrbase/gui/preferencesdialog.ui
@@ -10,6 +10,12 @@
     <height>300</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Dialog</string>
   </property>
diff --git a/sdrbase/mainwindow.ui b/sdrbase/mainwindow.ui
index ba4b05d6f..6d033638b 100644
--- a/sdrbase/mainwindow.ui
+++ b/sdrbase/mainwindow.ui
@@ -33,11 +33,26 @@
     </font>
    </property>
    <layout class="QVBoxLayout" name="verticalLayout_2">
-    <property name="margin">
+    <property name="leftMargin">
+     <number>0</number>
+    </property>
+    <property name="topMargin">
+     <number>0</number>
+    </property>
+    <property name="rightMargin">
+     <number>0</number>
+    </property>
+    <property name="bottomMargin">
      <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>
@@ -60,10 +75,16 @@
      <x>0</x>
      <y>0</y>
      <width>1012</width>
-     <height>20</height>
+     <height>22</height>
     </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>
@@ -72,6 +93,12 @@
     <addaction name="action_Exit"/>
    </widget>
    <widget class="QMenu" name="menu_Acquisition">
+    <property name="font">
+     <font>
+      <family>Sans Serif</family>
+      <pointsize>9</pointsize>
+     </font>
+    </property>
     <property name="title">
      <string>&amp;Acquisition</string>
     </property>
@@ -82,12 +109,24 @@
     <addaction name="action_Stop_Recording"/>
    </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>
@@ -96,11 +135,23 @@
     <addaction name="action_About"/>
    </widget>
    <widget class="QMenu" name="menu_Channels">
+    <property name="font">
+     <font>
+      <family>Sans Serif</family>
+      <pointsize>9</pointsize>
+     </font>
+    </property>
     <property name="title">
      <string>&amp;Channels</string>
     </property>
    </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>
@@ -116,6 +167,7 @@
    <property name="font">
     <font>
      <family>Sans Serif</family>
+     <pointsize>9</pointsize>
     </font>
    </property>
   </widget>
@@ -128,7 +180,16 @@
    </attribute>
    <widget class="QWidget" name="dockWidgetContents">
     <layout class="QGridLayout" name="gridLayout_6">
-     <property name="margin">
+     <property name="leftMargin">
+      <number>2</number>
+     </property>
+     <property name="topMargin">
+      <number>2</number>
+     </property>
+     <property name="rightMargin">
+      <number>2</number>
+     </property>
+     <property name="bottomMargin">
       <number>2</number>
      </property>
      <property name="spacing">
@@ -298,7 +359,16 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="margin">
+     <property name="leftMargin">
+      <number>2</number>
+     </property>
+     <property name="topMargin">
+      <number>2</number>
+     </property>
+     <property name="rightMargin">
+      <number>2</number>
+     </property>
+     <property name="bottomMargin">
       <number>2</number>
      </property>
      <item>
@@ -329,7 +399,16 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="margin">
+     <property name="leftMargin">
+      <number>2</number>
+     </property>
+     <property name="topMargin">
+      <number>2</number>
+     </property>
+     <property name="rightMargin">
+      <number>2</number>
+     </property>
+     <property name="bottomMargin">
       <number>2</number>
      </property>
      <item>
@@ -360,7 +439,16 @@
      <property name="spacing">
       <number>3</number>
      </property>
-     <property name="margin">
+     <property name="leftMargin">
+      <number>2</number>
+     </property>
+     <property name="topMargin">
+      <number>2</number>
+     </property>
+     <property name="rightMargin">
+      <number>2</number>
+     </property>
+     <property name="bottomMargin">
       <number>2</number>
      </property>
      <item>
@@ -380,6 +468,12 @@
    <property name="text">
     <string>E&amp;xit</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
    <property name="shortcut">
     <string>Ctrl+Q</string>
    </property>
@@ -388,6 +482,12 @@
    <property name="text">
     <string>&amp;Start</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
    <property name="shortcut">
     <string>F5</string>
    </property>
@@ -396,6 +496,12 @@
    <property name="text">
     <string>&amp;Stop</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
    <property name="shortcut">
     <string>F6</string>
    </property>
@@ -407,6 +513,12 @@
    <property name="text">
     <string>&amp;Fullscreen</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
    <property name="shortcut">
     <string>F11</string>
    </property>
@@ -426,21 +538,45 @@
    <property name="text">
     <string>&amp;About SDRangel...</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
   </action>
   <action name="action_Preferences">
    <property name="text">
     <string>&amp;Preferences...</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
   </action>
   <action name="action_Loaded_Plugins">
    <property name="text">
     <string>Loaded &amp;Plugins...</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
   </action>
   <action name="action_Start_Recording">
    <property name="text">
     <string>Start Recording</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
    <property name="shortcut">
     <string>F7</string>
    </property>
@@ -449,6 +585,12 @@
    <property name="text">
     <string>Stop Recording</string>
    </property>
+   <property name="font">
+    <font>
+     <family>Sans Serif</family>
+     <pointsize>9</pointsize>
+    </font>
+   </property>
    <property name="shortcut">
     <string>F8</string>
    </property>