def create_sigmode_toggle_button(self):
        """Instatiate button to toggle between signature modes."""
        button = self.sigmode_toggle_button = Object2D()
        button.image = SIGMODE_TOGGLE_BUTTON_MAP[self.category_color][0]
        button.rect = button.image.get_rect()
        button.rect.topleft = self.top_rectsman.move(2, 0).bottomleft
        button.on_mouse_release = self.toggle_sigmode
Instatiate button to toggle between signature modes.
nodezator/graphman/callablenode/vizprep/main.py