diff --git a/AABB_tree/demo/AABB_tree/MainWindow.cpp b/AABB_tree/demo/AABB_tree/MainWindow.cpp
index c4ffcc8ae3f..e3282019ab2 100644
--- a/AABB_tree/demo/AABB_tree/MainWindow.cpp
+++ b/AABB_tree/demo/AABB_tree/MainWindow.cpp
@@ -402,8 +402,10 @@ void MainWindow::on_actionRefine_loop_triggered()
 
 void MainWindow::on_actionSave_snapshot_triggered()
 {
+	// save snapshot to file
 	QApplication::setOverrideCursor(Qt::WaitCursor);
-  m_pViewer->saveSnapshot(QString("snapshot.png"));
+  QString filename = QFileDialog::getSaveFileName(this,tr("Save snapshot to file..."),"snapshot00.png","*.png");
+  m_pViewer->saveSnapshot(filename);
 	QApplication::restoreOverrideCursor();
 }
 void MainWindow::on_actionCopy_snapshot_triggered()