[Plugin: NextGEN Gallery] Problem with Image navigation

When I click a image link and the single image overlay opens the navigation links at the bottom of the image (<< and >>) not visible. You have to scroll down to ge to them. The image is being sized to take up the whole screen, top to bottom, so you have to scroll. I have tried making the images smaller and it doesn’t seem to do anything. Any ideas on why this is?

Thanks,

Michael