How to increase LineWidth of MSER and SURF Feature plots

Hi I have a very simple question. May be I am missing something.

Is it possible to increase the linewidth and change the color of the plots for MSER and SURF features?

    surf_points=detectSURFFeatures(img);
    h1=plot(surf_points)

will show the image 'img' with detected SURF features at the specified scales. In order to change the line color or width,

set(h1, 'LineWidth', 2)

or

set(h1, 'Color', r)

makes no difference. Is there any way to do it?