Hello, I am video engineer living in Tokyo,Japan. I've surfed the internet for years. SNS such as Facebook, Instagram, Tumblr etc.. are using high definition images. Have you downloaded the images and displayed them on the monitor? Most images are larger than the monitor and you only see a condensed version. It's not the image that the photographer wishes to show. The vertical scroller enlarges the image in the horizontal direction and displays an enlarged image. Parts of the image not displayed because of the enlargement are shown by automatic vertical scroll. You get an enhanced view much closer to what the photographer really wants to show, You will be amazed at the difference. Enjoy ! e-mail: email@example.com.