You have two degrees of freedom here, one is to scale the figure directly in latex, e.g. \includegraphics[width=8cm]{sage1.pdf}, or change the font size in the sage document. To do this, you could type p.fontsize(10) or some appropriate number just before p.save(). Just type p. and press the tab key to see all possible commands that can be passed to your plot. Also, type p.save? in the worksheet to find out about other options (e.g. legend_font_size()). Hope this helps.