In this video, “CSS3 Responsive Horizontal Slider Menu on Hover,” I’m going to pull some images in here just to bring the thing to life. I’m going to use PNG files. Why? I’m going to use PNG files because I’m going to make them circular with transparent backgrounds and I want to see through the backgrounds into the background of the web page itself. Jpegs do not support transparency but the PNG file format does (I use Png 24s).
If you want to know more about what file formats do what, you might want to take a look at our video, “Image File Formats.”