See example . In Summary, Word and image should complement each other in supporting the sign's interpretation. An essential aspect of visual imagery is the speed and directness at which recognition and identification take place. This critical advantage is heavily dependent on the quality and familiarity of the image , as well as its appropriateness for the concept being represented. Use iconic signs when concept is concrete, familiar and tangible.
Repetitious use is conducive to the implementation of conventional symbolic or indexical signs.
Abstract concepts should have accompanying text. Avoid the mixing of purely textual, iconic, indexical or symbolic signs within a single image set. Aim for consistency in look, and purpose.