diff --git a/gui/QT/ultragrid_window.cpp b/gui/QT/ultragrid_window.cpp
index 00cfa7bf6..c65f83c97 100644
--- a/gui/QT/ultragrid_window.cpp
+++ b/gui/QT/ultragrid_window.cpp
@@ -19,7 +19,7 @@ UltragridWindow::UltragridWindow(QWidget *parent): QMainWindow(parent){
 	connect(ui.startButton, SIGNAL(clicked()), this, SLOT(start()));
 	connect(&process, SIGNAL(readyReadStandardOutput()), this, SLOT(outputAvailable()));
 	connect(&process, SIGNAL(readyReadStandardError()), this, SLOT(outputAvailable()));
-	connect(&process, SIGNAL(stateChanged(QProcess::ProcessState)), this, SLOT(setStartBtnText(QProcess::ProcessState)));
+	connect(&process, SIGNAL(stateChanged(QProcess::ProcessState)), this, SLOT(processStateChanged(QProcess::ProcessState)));
 
 	connect(ui.networkDestinationEdit, SIGNAL(textEdited(const QString &)), this, SLOT(setArgs()));
 
@@ -28,9 +28,10 @@ UltragridWindow::UltragridWindow(QWidget *parent): QMainWindow(parent){
 	connect(ui.actionRefresh, SIGNAL(triggered()), this, SLOT(queryOpts()));
 	connect(ui.actionAdvanced, SIGNAL(toggled(bool)), this, SLOT(setAdvanced(bool)));
 	connect(ui.actionShow_Terminal, SIGNAL(triggered()), this, SLOT(showLog()));
+	connect(ui.previewCheckBox, SIGNAL(toggled(bool)), this, SLOT(enablePreview(bool)));
 
-	opts.emplace_back(new SourceOption(&ui,
-				ultragridExecutable));
+	sourceOption = new SourceOption(&ui, ultragridExecutable);
+	opts.emplace_back(sourceOption);
 
 	opts.emplace_back(new DisplayOption(&ui,
 				ultragridExecutable));
@@ -54,7 +55,11 @@ UltragridWindow::UltragridWindow(QWidget *parent): QMainWindow(parent){
 		connect(opt.get(), SIGNAL(changed()), this, SLOT(setArgs()));
 	}
 
+	connect(sourceOption, SIGNAL(changed()), this, SLOT(startPreview()));
+
 	queryOpts();
+
+	startPreview();
 }
 
 void UltragridWindow::about(){
@@ -85,9 +90,13 @@ void UltragridWindow::outputAvailable(){
 void UltragridWindow::start(){
 	if(process.pid() > 0){
 		process.terminate();
+		if(!process.waitForFinished(1000))
+			process.kill();
 		return;
 	}
 
+	stopPreview();
+
 	QString command(ultragridExecutable);
 
 	command += " ";
@@ -97,6 +106,31 @@ void UltragridWindow::start(){
 	process.start(command);
 }
 
+void UltragridWindow::startPreview(){
+	if(process.state() != QProcess::NotRunning || !ui.previewCheckBox->isChecked()){
+		return;
+	}
+
+	if(previewProcess.state() != QProcess::NotRunning)
+		stopPreview();
+
+	QString command(ultragridExecutable);
+	command += " ";
+	command += sourceOption->getLaunchParam();
+	command += "-d preview";
+
+	previewProcess.start(command);
+}
+
+void UltragridWindow::stopPreview(){
+	previewProcess.terminate();
+	/* The shared preview memory must be released before a new one
+	 * can be created. Here we wait 0.5s to allow the preview process
+	 * exit gracefully. If it is still running after that we kill it */
+	if(!previewProcess.waitForFinished(500))
+		previewProcess.kill();
+}
+
 void UltragridWindow::editArgs(const QString &text){
 	launchArgs = text;
 }
@@ -144,3 +178,18 @@ void UltragridWindow::setStartBtnText(QProcess::ProcessState s){
 		ui.startButton->setText("Start");
 	}
 }
+
+void UltragridWindow::enablePreview(bool enable){
+	if(enable)
+		startPreview();
+	else
+		stopPreview();
+}
+
+void UltragridWindow::processStateChanged(QProcess::ProcessState s){
+	setStartBtnText(s);
+
+	if(s == QProcess::NotRunning){
+		startPreview();
+	}
+}
diff --git a/gui/QT/ultragrid_window.hpp b/gui/QT/ultragrid_window.hpp
index 6a9493ffa..bf355f86a 100644
--- a/gui/QT/ultragrid_window.hpp
+++ b/gui/QT/ultragrid_window.hpp
@@ -23,12 +23,14 @@ private:
 
 	QString ultragridExecutable;
 	QProcess process;
+	QProcess previewProcess;
 
 	QString launchArgs;
 	QStringList getOptionsForParam(QString param);
 	LogWindow log;
 
 	std::vector<std::unique_ptr<UltragridOption>> opts;
+	UltragridOption *sourceOption;
 
 
 public slots:
@@ -41,10 +43,15 @@ public slots:
 
 	void showLog();
 
+	void startPreview();
+	void stopPreview();
+
 private slots:
 	void queryOpts();
 	void setAdvanced(bool);
 	void setStartBtnText(QProcess::ProcessState);
+	void processStateChanged(QProcess::ProcessState);
+	void enablePreview(bool);
 };