Pictures, such as a graphic of your cat or dog, may cause frustration for a user who has to wait 2 or 3 minutes for it to transfer and display. Before incorporating a graphic, assess its pertinence to the overall message. Limit the size of graphic files. This limit may mean that you use a banner rather than a full-screen graphic, or that you create the black and white graphics instead of using 256 colors. Avoid using large graphic menus.
Most users grow impatient when waiting for large graphic files to display.
Transmission rates for large graphics is a particular problem for users with slower modems. Use small graphic banners on pages. Small banners at the top of each page help to identify the site and add graphic appeal, without adversely impacting the transfer time. The banner may also provide a link to the Main Menu of the section, creating a quick, easy means of branching to the table of contents. Limit the number of graphics on each page.