- the 'save for web' panel in Illustrator, Photoshop and ImageReady gives you the opportunity compare, both visually and with statistics, four different versions of the image, with your own choices of format and quality. Notice how the panel also shows how many colours, and which, are used in each palette; here I chose 256, 128, 64 and 32.

Use the control to play it more than once if you like.