diff --git a/src/gui_qt/graphs/graphwindow.py b/src/gui_qt/graphs/graphwindow.py
index 65845bb..1ea3c4c 100644
--- a/src/gui_qt/graphs/graphwindow.py
+++ b/src/gui_qt/graphs/graphwindow.py
@@ -529,7 +529,7 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
         if path is None:
             path = ''
         outfile = None
-        f = FileDialog(caption='Export graphic', directory=str(path), filter=filters)
+        f = FileDialog(caption='Export graphic', directory=str(path), filter=filters, mode='save')
         mode = f.exec()
         if mode == QtWidgets.QDialog.Accepted:
             outfile = f.save_file()
diff --git a/src/gui_qt/io/filedialog.py b/src/gui_qt/io/filedialog.py
index 424a542..8340e72 100644
--- a/src/gui_qt/io/filedialog.py
+++ b/src/gui_qt/io/filedialog.py
@@ -8,10 +8,11 @@ from ..Qt import QtWidgets, QtCore
 class FileDialog(QtWidgets.QFileDialog):
     last_path = None
 
-    def __init__(self, directory=None, caption=None, filter='', parent=None):
+    def __init__(self, directory=None, caption=None, filter='', mode='open', parent=None):
         super().__init__(parent=parent)
 
         self.setOption(QtWidgets.QFileDialog.DontUseNativeDialog, True)
+        self.setAcceptMode(QtWidgets.QFileDialog.AcceptOpen if mode == 'open' else QtWidgets.QFileDialog.AcceptSave)
 
         self.setWindowTitle(caption)
         if directory: