diff --git a/plugins/samplesource/airspy/airspygui.ui b/plugins/samplesource/airspy/airspygui.ui
index 5087fba59..f9b894d58 100644
--- a/plugins/samplesource/airspy/airspygui.ui
+++ b/plugins/samplesource/airspy/airspygui.ui
@@ -126,6 +126,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QSlider" name="LOppm">
+       <property name="toolTip">
+        <string>Local Oscillator frequency correction (ppm)</string>
+       </property>
        <property name="minimum">
         <number>-100</number>
        </property>
@@ -153,6 +156,9 @@
     <layout class="QGridLayout" name="gridLayout_corr">
      <item row="0" column="1">
       <widget class="ButtonSwitch" name="dcOffset">
+       <property name="toolTip">
+        <string>DC offset auto correction</string>
+       </property>
        <property name="text">
         <string>DC offset</string>
        </property>
@@ -160,6 +166,9 @@
      </item>
      <item row="0" column="2">
       <widget class="ButtonSwitch" name="iqImbalance">
+       <property name="toolTip">
+        <string>IQ imbalance auto correction</string>
+       </property>
        <property name="text">
         <string>IQ imbalance</string>
        </property>
@@ -188,6 +197,9 @@
      </property>
      <item row="0" column="2">
       <widget class="QCheckBox" name="biasT">
+       <property name="toolTip">
+        <string>Antenna bias ON/OFF</string>
+       </property>
        <property name="text">
         <string>Bias T</string>
        </property>
@@ -229,6 +241,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QSlider" name="decim">
+       <property name="toolTip">
+        <string>Decimation factor</string>
+       </property>
        <property name="maximum">
         <number>6</number>
        </property>
@@ -288,6 +303,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QComboBox" name="fcPos">
+       <property name="toolTip">
+        <string>Relative position of device center frequency</string>
+       </property>
        <item>
         <property name="text">
          <string>Inf</string>
@@ -499,17 +517,17 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/bladerf/bladerfgui.ui b/plugins/samplesource/bladerf/bladerfgui.ui
index ca08019af..62ce1e1c5 100644
--- a/plugins/samplesource/bladerf/bladerfgui.ui
+++ b/plugins/samplesource/bladerf/bladerfgui.ui
@@ -29,7 +29,16 @@
    <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>
@@ -76,7 +85,6 @@
        <property name="toolTip">
         <string>Tuner center frequency in kHz</string>
        </property>
-       <zorder>freqRightlSpacer</zorder>
       </widget>
      </item>
      <item>
@@ -159,7 +167,10 @@
      </item>
      <item row="0" column="1">
       <widget class="QComboBox" name="xb200">
-       <property name="currentText" stdset="0">
+       <property name="toolTip">
+        <string>XB200 board mode</string>
+       </property>
+       <property name="currentText">
         <string>None</string>
        </property>
        <property name="currentIndex">
@@ -296,7 +307,7 @@
      <item row="0" column="1">
       <widget class="QSlider" name="bandwidth">
        <property name="toolTip">
-        <string>Device Samplerate</string>
+        <string>RF filter bandwidth</string>
        </property>
        <property name="maximum">
         <number>15</number>
@@ -361,6 +372,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QSlider" name="decim">
+       <property name="toolTip">
+        <string>Decimation log2 factor</string>
+       </property>
        <property name="maximum">
         <number>5</number>
        </property>
@@ -427,6 +441,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QComboBox" name="fcPos">
+       <property name="toolTip">
+        <string>Relative position of device center frequency</string>
+       </property>
        <item>
         <property name="text">
          <string>Inf</string>
@@ -477,7 +494,7 @@
         <bool>true</bool>
        </property>
        <property name="toolTip">
-        <string>LNA amplification</string>
+        <string>LNA gain (dB)</string>
        </property>
        <property name="maximum">
         <number>2</number>
@@ -523,7 +540,7 @@
      <item row="0" column="1">
       <widget class="QSlider" name="vga1">
        <property name="toolTip">
-        <string>Amplifier before filtering</string>
+        <string>Amplifier before filtering gain (dB)</string>
        </property>
        <property name="minimum">
         <number>5</number>
@@ -589,7 +606,7 @@
      <item row="0" column="1">
       <widget class="QSlider" name="vga2">
        <property name="toolTip">
-        <string>Amplifier before ADC</string>
+        <string>Amplifier before ADC gain (dB)</string>
        </property>
        <property name="maximum">
         <number>30</number>
diff --git a/plugins/samplesource/fcdpro/fcdprogui.ui b/plugins/samplesource/fcdpro/fcdprogui.ui
index f1ac4da9b..7d6f07deb 100644
--- a/plugins/samplesource/fcdpro/fcdprogui.ui
+++ b/plugins/samplesource/fcdpro/fcdprogui.ui
@@ -118,7 +118,7 @@
      <item>
       <widget class="QSlider" name="ppm">
        <property name="toolTip">
-        <string>LO ppm correction</string>
+        <string>Local Oscillator ppm correction</string>
        </property>
        <property name="minimum">
         <number>-2000</number>
@@ -185,6 +185,9 @@
     <layout class="QHBoxLayout" name="layoutBiasT">
      <item>
       <widget class="QPushButton" name="setDefaults">
+       <property name="toolTip">
+        <string>Set all values to typical defaults</string>
+       </property>
        <property name="text">
         <string>Defaults</string>
        </property>
@@ -387,17 +390,17 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/fcdproplus/fcdproplusgui.ui b/plugins/samplesource/fcdproplus/fcdproplusgui.ui
index 106a101f7..5ea7642d7 100644
--- a/plugins/samplesource/fcdproplus/fcdproplusgui.ui
+++ b/plugins/samplesource/fcdproplus/fcdproplusgui.ui
@@ -118,7 +118,7 @@
      <item>
       <widget class="QSlider" name="ppm">
        <property name="toolTip">
-        <string>LO ppm correction</string>
+        <string>Local Oscillator ppm correction</string>
        </property>
        <property name="minimum">
         <number>-100</number>
@@ -196,7 +196,7 @@
      <item>
       <widget class="QCheckBox" name="mixGain">
        <property name="toolTip">
-        <string>Activate mixer gain</string>
+        <string>Activate mixer amplifier</string>
        </property>
        <property name="text">
         <string>Mix</string>
@@ -206,7 +206,7 @@
      <item>
       <widget class="QCheckBox" name="checkBoxB">
        <property name="toolTip">
-        <string>Activate bias tee</string>
+        <string>Activate antenna bias tee</string>
        </property>
        <property name="text">
         <string>Bias T</string>
@@ -226,6 +226,9 @@
      </item>
      <item>
       <widget class="QSlider" name="ifGain">
+       <property name="toolTip">
+        <string>Intermediate Frequency stages gain</string>
+       </property>
        <property name="maximum">
         <number>59</number>
        </property>
@@ -294,17 +297,17 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/filesource/filesourcegui.ui b/plugins/samplesource/filesource/filesourcegui.ui
index 85614c792..b50a9cf3c 100644
--- a/plugins/samplesource/filesource/filesourcegui.ui
+++ b/plugins/samplesource/filesource/filesourcegui.ui
@@ -135,6 +135,9 @@
          <height>24</height>
         </size>
        </property>
+       <property name="toolTip">
+        <string>Open file</string>
+       </property>
        <property name="text">
         <string/>
        </property>
@@ -149,6 +152,9 @@
        <property name="enabled">
         <bool>false</bool>
        </property>
+       <property name="toolTip">
+        <string>File currently opened</string>
+       </property>
        <property name="text">
         <string>...</string>
        </property>
@@ -321,17 +327,17 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../../sdrbase/resources/res.qrc"/>
diff --git a/plugins/samplesource/hackrf/hackrfgui.ui b/plugins/samplesource/hackrf/hackrfgui.ui
index c96427ceb..f0bdf0fa0 100644
--- a/plugins/samplesource/hackrf/hackrfgui.ui
+++ b/plugins/samplesource/hackrf/hackrfgui.ui
@@ -126,6 +126,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QSlider" name="LOppm">
+       <property name="toolTip">
+        <string>Local Oscullator ppm correction</string>
+       </property>
        <property name="minimum">
         <number>-100</number>
        </property>
@@ -220,7 +223,11 @@
       </widget>
      </item>
      <item row="0" column="3">
-      <widget class="QComboBox" name="bbFilter"/>
+      <widget class="QComboBox" name="bbFilter">
+       <property name="toolTip">
+        <string>RF bandpas filter</string>
+       </property>
+      </widget>
      </item>
      <item row="0" column="4">
       <spacer name="horizontalSpacer">
@@ -251,6 +258,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QSlider" name="decim">
+       <property name="toolTip">
+        <string>Decimation factor</string>
+       </property>
        <property name="maximum">
         <number>6</number>
        </property>
@@ -297,6 +307,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QComboBox" name="fcPos">
+       <property name="toolTip">
+        <string>Relative position of device center frequency</string>
+       </property>
        <item>
         <property name="text">
          <string>Inf</string>
@@ -316,6 +329,9 @@
      </item>
      <item row="0" column="2">
       <widget class="QCheckBox" name="biasT">
+       <property name="toolTip">
+        <string>Activate antenna bias tee</string>
+       </property>
        <property name="layoutDirection">
         <enum>Qt::RightToLeft</enum>
        </property>
@@ -462,17 +478,17 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.ui b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
index 4fcc04ee8..33f01eb41 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.ui
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
@@ -116,6 +116,9 @@
      </property>
      <item row="0" column="1">
       <widget class="QSlider" name="ppm">
+       <property name="toolTip">
+        <string>Local Oscillator ppm correction</string>
+       </property>
        <property name="minimum">
         <number>-99</number>
        </property>
@@ -256,6 +259,9 @@
      </item>
      <item row="0" column="1">
       <widget class="QSlider" name="decim">
+       <property name="toolTip">
+        <string>Decimation factor</string>
+       </property>
        <property name="maximum">
         <number>4</number>
        </property>
@@ -292,6 +298,9 @@
     <layout class="QGridLayout" name="gridLayout_fcPos">
      <item row="0" column="1">
       <widget class="QComboBox" name="fcPos">
+       <property name="toolTip">
+        <string>Relative postion of device center frequency</string>
+       </property>
        <item>
         <property name="text">
          <string>Inf</string>
@@ -362,7 +371,7 @@
         <bool>false</bool>
        </property>
        <property name="toolTip">
-        <string>LNA amplification</string>
+        <string>LNA amplification (dB)</string>
        </property>
        <property name="maximum">
         <number>0</number>
@@ -404,6 +413,9 @@
     <layout class="QHBoxLayout" name="horizontalLayout_direct">
      <item>
       <widget class="QCheckBox" name="checkBox">
+       <property name="toolTip">
+        <string>RTLSDR special direct sampling mode (HF Bands)</string>
+       </property>
        <property name="text">
         <string>No-mod Direct Sampling</string>
        </property>
@@ -427,17 +439,17 @@
   </layout>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>