diff --git a/qt/lc_qmodellistdialog.cpp b/qt/lc_qmodellistdialog.cpp
index 7453df1a..f04015cd 100644
--- a/qt/lc_qmodellistdialog.cpp
+++ b/qt/lc_qmodellistdialog.cpp
@@ -33,12 +33,30 @@ int lcQModelListDialog::GetActiveModelIndex() const
 
 void lcQModelListDialog::UpdateButtons()
 {
-	int CurrentModel = ui->ModelList->currentRow();
-	int NumModels = ui->ModelList->count();
+	int ModelCount = ui->ModelList->count();
 
-	ui->DeleteModel->setEnabled(NumModels > 1);
-	ui->MoveUp->setEnabled(NumModels > 1 && CurrentModel > 0);
-	ui->MoveDown->setEnabled(NumModels > 1 && CurrentModel < NumModels - 1);
+	ui->DeleteModel->setEnabled(ModelCount > 1);
+	ui->SetActiveModel->setEnabled(ui->ModelList->currentItem() != nullptr);
+
+	bool MoveUp = false;
+	bool MoveDown = false;
+
+	for (int Row = 0; Row < ui->ModelList->count(); Row++)
+	{
+		QListWidgetItem* Item = ui->ModelList->item(Row);
+
+		if (!Item->isSelected())
+			continue;
+
+		if (Row > 0 && !ui->ModelList->item(Row - 1)->isSelected())
+			MoveUp = true;
+
+		if (Row < ModelCount - 1 && !ui->ModelList->item(Row + 1)->isSelected())
+			MoveDown = true;
+	}
+
+	ui->MoveUp->setEnabled(MoveUp);
+	ui->MoveDown->setEnabled(MoveDown);
 }
 
 void lcQModelListDialog::accept()
@@ -76,25 +94,35 @@ void lcQModelListDialog::on_DeleteModel_clicked()
 {
 	if (ui->ModelList->count() == 1)
 	{
-		QMessageBox::information(this, tr("Error"), tr("The model cannot be empty."));
+		QMessageBox::information(this, tr("Delete Submodel"), tr("The model cannot be empty."));
 		return;
 	}
 
 	QList<QListWidgetItem*>	SelectedItems = ui->ModelList->selectedItems();
 
 	if (SelectedItems.isEmpty())
+	{
+		QMessageBox::information(this, tr("Delete Submodel"), tr("No submodel selected."));
 		return;
+	}
+
+	QString Prompt;
+	if (SelectedItems.size() == 1)
+		Prompt = tr("Are you sure you want to delete the submodel '%1'?").arg(SelectedItems[0]->text());
+	else
+		Prompt = tr("Are you sure you want to delete %1 submodels?").arg(QString::number(SelectedItems.size()));
 
-	QString Prompt = tr("Are you sure you want to delete the submodel '%1'?").arg(SelectedItems[0]->text());
 	if (QMessageBox::question(this, tr("Delete Submodel"), Prompt, QMessageBox::Yes | QMessageBox::No) != QMessageBox::Yes)
 		return;
 
-	QListWidgetItem* SelectedItem = SelectedItems.first();
+	for (QListWidgetItem* SelectedItem : SelectedItems)
+	{
+		if (mActiveModelItem == SelectedItem)
+			mActiveModelItem = nullptr;
 
-	if (mActiveModelItem == SelectedItem)
-		mActiveModelItem = nullptr;
+		delete SelectedItem;
+	}
 
-	delete SelectedItem;
 	UpdateButtons();
 }
 
@@ -103,78 +131,119 @@ void lcQModelListDialog::on_RenameModel_clicked()
 	QList<QListWidgetItem*>	SelectedItems = ui->ModelList->selectedItems();
 
 	if (SelectedItems.isEmpty())
+	{
+		QMessageBox::information(this, tr("Rename Submodel"), tr("No submodel selected."));
 		return;
+	}
 
-	QStringList ModelNames;
+	for (QListWidgetItem* CurrentItem : SelectedItems)
+	{
+		QStringList ModelNames;
 
-	for (int ItemIdx = 0; ItemIdx < ui->ModelList->count(); ItemIdx++)
-		ModelNames.append(ui->ModelList->item(ItemIdx)->text());
+		for (int ItemIdx = 0; ItemIdx < ui->ModelList->count(); ItemIdx++)
+			ModelNames.append(ui->ModelList->item(ItemIdx)->text());
 
-	QString Name = lcGetActiveProject()->GetNewModelName(this, tr("Rename Submodel"), SelectedItems[0]->text(), ModelNames);
+		QString Name = lcGetActiveProject()->GetNewModelName(this, tr("Rename Submodel"), CurrentItem->text(), ModelNames);
 
-	if (!Name.isEmpty())
-		SelectedItems[0]->setText(Name);
+		if (!Name.isEmpty())
+			CurrentItem->setText(Name);
+	}
 }
 
 void lcQModelListDialog::on_ExportModel_clicked()
 {
-	QListWidgetItem* CurrentItem = ui->ModelList->currentItem();
+	QList<QListWidgetItem*>	SelectedItems = ui->ModelList->selectedItems();
 
-	if (!CurrentItem)
-		return;
-
-	lcModel* Model = (lcModel*)CurrentItem->data(Qt::UserRole).value<uintptr_t>();
-
-	if (!Model)
+	if (SelectedItems.isEmpty())
 	{
-		QMessageBox::information(this, tr("LeoCAD"), tr("Nothing to export."));
+		QMessageBox::information(this, tr("Export Submodel"), tr("No submodel selected."));
 		return;
 	}
 
-	QString SaveFileName = QFileInfo(QDir(lcGetProfileString(LC_PROFILE_PROJECTS_PATH)), CurrentItem->text()).absoluteFilePath();
+	if (SelectedItems.size() == 1)
+	{
+		QListWidgetItem* CurrentItem = SelectedItems[0];
+		lcModel* Model = (lcModel*)CurrentItem->data(Qt::UserRole).value<uintptr_t>();
 
-	SaveFileName = QFileDialog::getSaveFileName(this, tr("Save Model"), SaveFileName, tr("Supported Files (*.ldr *.dat);;All Files (*.*)"));
+		if (!Model)
+		{
+			QMessageBox::information(this, tr("LeoCAD"), tr("Nothing to export."));
+			return;
+		}
 
-	if (SaveFileName.isEmpty())
-		return;
+		QString SaveFileName = QFileInfo(QDir(lcGetProfileString(LC_PROFILE_PROJECTS_PATH)), CurrentItem->text()).absoluteFilePath();
 
-	lcGetActiveProject()->ExportModel(SaveFileName, Model);
+		SaveFileName = QFileDialog::getSaveFileName(this, tr("Save Model"), SaveFileName, tr("Supported Files (*.ldr *.dat);;All Files (*.*)"));
 
-	lcSetProfileString(LC_PROFILE_PROJECTS_PATH, QFileInfo(SaveFileName).absolutePath());
+		if (SaveFileName.isEmpty())
+			return;
+
+		lcGetActiveProject()->ExportModel(SaveFileName, Model);
+
+		lcSetProfileString(LC_PROFILE_PROJECTS_PATH, QFileInfo(SaveFileName).absolutePath());
+	}
+	else
+	{
+		QString Folder = QFileDialog::getExistingDirectory(this, tr("Select Parts Library Folder"), lcGetProfileString(LC_PROFILE_PROJECTS_PATH));
+
+		for (QListWidgetItem* CurrentItem : SelectedItems)
+		{
+			lcModel* Model = (lcModel*)CurrentItem->data(Qt::UserRole).value<uintptr_t>();
+
+			if (Model)
+			{
+				QString SaveFileName = QFileInfo(QDir(Folder), CurrentItem->text()).absoluteFilePath();
+				lcGetActiveProject()->ExportModel(SaveFileName, Model);
+			}
+		}
+
+		lcSetProfileString(LC_PROFILE_PROJECTS_PATH, Folder);
+	}
 }
 
 void lcQModelListDialog::on_MoveUp_clicked()
 {
-	QList<QListWidgetItem*>	SelectedItems = ui->ModelList->selectedItems();
+	bool Blocked = ui->ModelList->blockSignals(true);
 
-	if (SelectedItems.isEmpty())
-		return;
+	for (int Row = 1; Row < ui->ModelList->count(); Row++)
+	{
+		QListWidgetItem* Item = ui->ModelList->item(Row);
 
-	QListWidgetItem* Item = SelectedItems[0];
-	int Row = ui->ModelList->row(Item);
+		if (!Item->isSelected())
+			continue;
 
-	if (Row == 0)
-		return;
+		if (ui->ModelList->item(Row - 1)->isSelected())
+			continue;
 
-	ui->ModelList->takeItem(Row);
-	ui->ModelList->insertItem(Row - 1, Item);
-	ui->ModelList->setCurrentItem(Item);
+		ui->ModelList->takeItem(Row);
+		ui->ModelList->insertItem(Row - 1, Item);
+		Item->setSelected(true);
+	}
+
+	ui->ModelList->blockSignals(Blocked);
 	UpdateButtons();
 }
 
 void lcQModelListDialog::on_MoveDown_clicked()
 {
-	QList<QListWidgetItem*>	SelectedItems = ui->ModelList->selectedItems();
+	bool Blocked = ui->ModelList->blockSignals(true);
 
-	if (SelectedItems.isEmpty())
-		return;
+	for (int Row = ui->ModelList->count() - 2; Row >= 0; Row--)
+	{
+		QListWidgetItem* Item = ui->ModelList->item(Row);
 
-	QListWidgetItem* Item = SelectedItems[0];
-	int Row = ui->ModelList->row(Item);
+		if (!Item->isSelected())
+			continue;
 
-	ui->ModelList->takeItem(Row);
-	ui->ModelList->insertItem(Row + 1, Item);
-	ui->ModelList->setCurrentItem(Item);
+		if (ui->ModelList->item(Row + 1)->isSelected())
+			continue;
+
+		ui->ModelList->takeItem(Row);
+		ui->ModelList->insertItem(Row + 1, Item);
+		Item->setSelected(true);
+	}
+
+	ui->ModelList->blockSignals(Blocked);
 	UpdateButtons();
 }
 
@@ -190,9 +259,7 @@ void lcQModelListDialog::on_ModelList_itemDoubleClicked(QListWidgetItem* Item)
 	accept();
 }
 
-void lcQModelListDialog::on_ModelList_currentRowChanged(int CurrentRow)
+void lcQModelListDialog::on_ModelList_itemSelectionChanged()
 {
-	Q_UNUSED(CurrentRow);
-
 	UpdateButtons();
 }
diff --git a/qt/lc_qmodellistdialog.h b/qt/lc_qmodellistdialog.h
index b7df21ba..18967321 100644
--- a/qt/lc_qmodellistdialog.h
+++ b/qt/lc_qmodellistdialog.h
@@ -28,7 +28,7 @@ public slots:
 	void on_MoveDown_clicked();
 	void on_SetActiveModel_clicked();
 	void on_ModelList_itemDoubleClicked(QListWidgetItem* Item);
-	void on_ModelList_currentRowChanged(int CurrentRow);
+	void on_ModelList_itemSelectionChanged();
 
 private:
 	QListWidgetItem* mActiveModelItem;
diff --git a/qt/lc_qmodellistdialog.ui b/qt/lc_qmodellistdialog.ui
index 6180b6bf..b9fb3a77 100644
--- a/qt/lc_qmodellistdialog.ui
+++ b/qt/lc_qmodellistdialog.ui
@@ -17,7 +17,11 @@
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
-      <widget class="QListWidget" name="ModelList"/>
+      <widget class="QListWidget" name="ModelList">
+       <property name="selectionMode">
+        <enum>QAbstractItemView::ExtendedSelection</enum>
+       </property>
+      </widget>
      </item>
      <item>
       <layout class="QVBoxLayout" name="verticalLayout_2">