To download a low-resolution image in .jpg format, click either the photo or the 'LO RES' link under the image you wish to download. When the larger photo appears, right-click the image (Windows) or option-click the image (MacOS) and choose 'Save Image As' or 'download Image to Disk' from the menu that appears.
To download a high-resolution image in the TIFF file format, click the 'HI RES' link below the image and then chose 'save file' from the window that opens (Windows) or if you are using a Mac, simply click the 'HI RES' link and image will automatically download to your machine.