adding to psychboiler's response, it seems that you and your colleague have different style settings.

A simple way around such inconsistency is to keep a customize style file in your experiment's input folder, rather than allowing DirectRT to refer to its default style file, "styles.drt" in the DirectRT installation directory.

Occasionally, Experimenter A edits and saves their own default style file, whereas Experimenter B did not save such edits to their own style file. In such a case, when the experiment is run on both computers, it will appear differently.