environment/lib/python2.7/site-packages/IPython/frontend/qt/console/console_widget.py
def change_font_size(self, delta):
        """Change the font size by the specified amount (in points).
        """
        font = self.font
        size = max(font.pointSize() + delta, 1) # minimum 1 point
        font.setPointSize(size)
        self._set_font(font)
def change_font_size(self, delta):
        """Change the font size by the specified amount (in points).
        """
        font = self.font
        size = max(font.pointSize() + delta, 1) # minimum 1 point
        font.setPointSize(size)
        self._set_font(font)
Change the font size by the specified amount (in points).