Saying “pictures are worth the thousand words” means that the complex idea can be conveyed with just a single still image. It characterizes one of the main goals of visualization, i.e. in it possible to absorb large amounts of information quickly. Drawings or photographs greatly enhance with the use of visuals. Below are some general guidelines for using visuals.
Show pictures of only what you want people to do. People remember pictures. So do not show any behaviour that are not relevant to your message.
Convey your messages in a caption under the picture when appropriate.
Don’t use graphics to decorate the page. This can be distracting and make words difficult to see