Index: sources/view/settings/VSettings.cpp
===================================================================
diff -u -rbf9223700613ced6c377f3e3a7b4de8367c30474 -rb12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd
--- sources/view/settings/VSettings.cpp	(.../VSettings.cpp)	(revision bf9223700613ced6c377f3e3a7b4de8367c30474)
+++ sources/view/settings/VSettings.cpp	(.../VSettings.cpp)	(revision b12cc2840bb819c5222bfd3bc2cc5ca6eb4c37fd)
@@ -43,6 +43,7 @@
     PROPERTY_POST_CONNECTION(VSettings, integratedBPCuff    );
     PROPERTY_POST_CONNECTION(VSettings, heparinSyringePump  );
     PROPERTY_POST_CONNECTION(VSettings, chemicalDisinfection);
+    PROPERTY_POST_CONNECTION(VSettings, darkMode            );
     PROPERTY_POST_CONNECTION(VSettings, advancedMode);
     init = true;
 }
@@ -93,6 +94,14 @@
     }
 }
 
+void VSettings::darkMode_post(const bool &vdarkMode_post) {
+    //TODO  The Settings shall be the Singleton SettingsController and modify the MSettings like the others.
+    if ( Storage::Settings::save(darkModeGroup(), darkModeKey(), QString::number(vdarkMode_post)) != 0 ) {
+        darkMode(false);
+        // FIXME: Notify UI with a message
+    }
+}
+
 void VSettings::alarmVolume_post(const quint8 &valarmVolume) {
     //TODO  The Settings shall be the Singleton SettingsController and modify the MSettings like the others.
     Storage::Settings::save(alarmVolumeGroup(), alarmVolumeKey(), QString::number(valarmVolume));
@@ -166,6 +175,12 @@
                         keyValue[key]           = mChemicalDisinfection ;
                         chemicalDisinfection    ( mChemicalDisinfection );
                     }
+                    else if ( isdarkMode                (category, group, key) ) {
+                        bool mDarkMode;
+                        mDarkMode       = _Settings.value(category, group, key).toBool    ();
+                        keyValue[key]   = mDarkMode ;
+                        darkMode        ( mDarkMode );
+                    }
                     else if ( isalarmVolume (category, group, key) ) {
                         quint8 mAlarmVolume;
                         mAlarmVolume    = _Settings.value(category, group, key).toInt     (); // returns 0 if fails, so no error checking needed.