--- a/src/mainwindow.h Sun Mar 13 20:26:28 2022 +0200 +++ b/src/mainwindow.h Tue Mar 15 18:52:48 2022 +0200 @@ -49,6 +49,7 @@ void actionSaveAs(); void actionClose(); void actionDelete(); + void actionInvert(); void handleTabCloseButton(int tabIndex); protected: void changeEvent(QEvent* event) override;