How can diagramming tools help support programming activities?

We report on an exploratory study we conducted to investigate what kind of diagrammatic tool support, if any, is desired by programmers. The study involved 19 professional programmers working at three different companies. We found that the study participants desire a wide range of information content in diagrams, which would change depending upon the particular context of use. Meeting these needs may require flexible, adaptive and responsive diagramming tool support.