diff -r bb60dda3093f -r caac957e9834 src/mainwindow.cpp
--- a/src/mainwindow.cpp	Sat Feb 01 15:49:28 2020 +0200
+++ b/src/mainwindow.cpp	Sat Feb 01 17:10:11 2020 +0200
@@ -68,10 +68,13 @@
 	}
 	this->updateTitle();
 	this->restoreSettings();
-	this->updateRenderStyles();
+	this->updateRenderPreferences();
 	this->newModel();
 }
 
+// MainWindow needs a destructor even if it is empty because otherwise the destructor of the
+// std::unique_ptr is resolved in the header file, where it will complain about Ui_MainWindow
+// being incomplete.
 MainWindow::~MainWindow()
 {
 }
@@ -162,7 +165,7 @@
 void MainWindow::openModelForEditing(const QString& modelName)
 {
 	Document* document = new Document{this->documents.findModelByName(modelName), &this->documents, this->colorTable};
-	document->setRenderStyle(this->renderStyle);
+	document->setRenderPreferences(this->renderPreferences);
 	this->ui->tabs->addTab(document, modelName);
 	this->ui->tabs->setCurrentWidget(document);
 	document->restoreSplitterState(this->documentSplitterState);
@@ -221,9 +224,9 @@
 
 void MainWindow::setRenderStyle(gl::RenderStyle renderStyle)
 {
-	this->renderStyle = renderStyle;
+	this->renderPreferences.style = renderStyle;
 	this->saveSettings();
-	this->updateRenderStyles();
+	this->updateRenderPreferences();
 }
 
 void MainWindow::changeEvent(QEvent* event)
@@ -264,20 +267,20 @@
 	setWindowTitle(title);
 }
 
-void MainWindow::updateRenderStyles()
+void MainWindow::updateRenderPreferences()
 {
 	for (int i = 0; i < this->ui->tabs->count(); i += 1)
 	{
 		Document* document = qobject_cast<Document*>(this->ui->tabs->widget(i));
 		if (document != nullptr)
 		{
-			document->setRenderStyle(renderStyle);
+			document->setRenderPreferences(this->renderPreferences);
 		}
 	}
 	for (auto data : ::renderStyleButtons)
 	{
 		QAction* action = data.memberInstance(this->ui.get());
-		action->setChecked(this->renderStyle == data.payload);
+		action->setChecked(this->renderPreferences.style == data.payload);
 	}
 }
 
@@ -289,7 +292,7 @@
 	this->settings.setValue("MainWindow/Geometry", this->saveGeometry());
 	this->settings.setValue("MainWindow/RecentlyOpened", this->recentlyOpenedFiles);
 	this->settings.setValue("MainWindow/DocumentSplitterState", this->documentSplitterState);
-	this->settings.setValue("MainWindow/RenderStyle", static_cast<int>(this->renderStyle));
+	this->settings.setValue("MainWindow/RenderStyle", static_cast<int>(this->renderPreferences.style));
 	this->libraries.storeToSettings(&this->settings);
 }
 
@@ -301,13 +304,15 @@
 	this->restoreGeometry(this->settings.value("MainWindow/Geometry").toByteArray());
 	this->recentlyOpenedFiles = this->settings.value("MainWindow/RecentlyOpened").toStringList();
 	this->documentSplitterState = this->settings.value("MainWindow/DocumentSplitterState").toByteArray();
-	this->renderStyle = static_cast<gl::RenderStyle>(this->settings.value("MainWindow/RenderStyle").toInt());
+	this->renderPreferences.style = static_cast<gl::RenderStyle>(this->settings.value("Render/Style").toInt());
+	this->renderPreferences.mainColor = this->settings.value("Render/MainColor").toString();
 	const QString systemLocale = QLocale::system().name();
 	const QVariant defaultLocale = this->settings.value("locale", systemLocale);
 	changeLanguage(defaultLocale.toString());
 	this->libraries.restoreFromSettings(&this->settings);
 	this->updateRecentlyOpenedDocumentsMenu();
 	this->loadColors();
+	this->updateRenderPreferences();
 }
 
 QString MainWindow::pathToTranslation(const QString& localeCode)