def zoom_1_to_1(self):
        """Zoom the view to a 1 to 1 pixel ratio (100 %%).
        """
        viewer = self.getfocus_viewer()
        if hasattr(viewer, 'scale_to'):
            viewer.scale_to(1.0, 1.0)
        return True
Zoom the view to a 1 to 1 pixel ratio (100 %%).