Eleven potential relationships exist among simultaneously presented messages in multi-image lectures. These are redundancy, cross-modality redundancy, generic/specific relationships, comparison/contrast, interaction of variables, parallel messages, analogical messages, temporal relationships, spatial relationships, generic concepts, and ideograms. These relationships do not, however, function discretely in an actual lecture. Other variables such as types and rates of change on screens and general aesthetic considerations can interact with those relationships to create the total effect of a multi-image lecture. (CH)