The taxonomy presented in this paper lends structure to the range of tasks or problems possible within an interactive graphical medium. Some 70 items from a testing project were the basis for forming the categories described in the taxonomy. Items were drawn from science and technology domains. The categorical scheme was refined iteratively by two raters until it was able to accommodate all items. The framework is intended to have utility in the design of problems cast within an interactive graphical medium. The following item types are included: (1) point to image element; (2) evaluate image; (3) show direction/path; (4) show height, extent, or boundaries; (5) assemble elements; 6) indicate categorical, ordinal, or functional relationships; and (7) indicate continuous relationships. (Contains one table and eight references.) (Author/SLD)