It depends on your exact definition of "find". Exactly what do you mean by that?
If you just want to mouse around on the image and see the (x,y) and (r,g,b) on the figure window in a status text line, call impixelinfo:
hp = impixelinfo();
You can move it to a different place by setting the Position property of hp:
hp.Units = 'normalized';
hp.Position = [0.2, 0.95, 0.3, 0.05];
