Times have changed, the snow has melted, and the Web has become a place where visitors expect slick, professional graphics. The first step in understanding how to create and manage graphics for the Web is understanding the graphical image itself. The pixels are so small they can't be detected individually by the human eye, so they create the illusion of a continuous image. Surely you held a magnifying glass up to the TV screen when you were a child. If not, go and try it right now.
Some screens have dots, some have lines, but the principle is the same.
So, read on, and I'll help prepare you to handle your pixels properly. Web formats Web browsers can only display graphics saved in special file types. It's important to know the differences and choose the best format for each image, so that pictures are as compact as they can be so they show up on your site visitor's screen as quickly as possible. So a 12K file will usually take about six seconds to download and view. The fewer colors you use, the more efficient GIF files are.