after first imshow function, image is not shown

Hi everybody, I have a problem with showing image. After first image other figures are not shown. Thanks

I= imread('pout.tif');

mask = roipoly(I);

figure

imshow(mask);

J = regionfill(I,mask);

figure

imshow(J);

Answer 1

[Image Analyst]

When you double click inside the polygon, it will show the other figures.