Seeing is Believing: Communicating Information Graphically
http://www.stc.org/ConfProceed/1997/PDFs/0066.pdf

Lisberg, Beth Conney
STC Proceedings
1997

Abstract:

Diverse work situations and varied skills, abilities, and motivation affect how users handle documentation to do their jobs. Communicating graphically challenges the communicator to 1) select illustrations that orient users ana' 2) use dynamic arrows to show the motion required. The communicator then 3) shows the order of steps within a task by using numbers with 'numberness.' Users' eyes seek information dynamically: help them find needed i$ormation by 4) keeping tasks within eyespan on a page. Then 5) use a grid to consistently layout an interesting page.