You may have to wait a while for the gallery you have chosen to load up. Once the paintings appear on your screen you can click on any image you can see and it will come to the middle, or, you can use the scroll bar below the images. Then, you can click on the central image and it will enlarge. Scroll down to see the description. Click on it again to reduce it.
Just click the central image to enlarge it and then right click on the image and "Save Image As..."