Once there is agreement on the task objects and actions and their decomposition, the designer can create the metaphoric representations of the interface
objects and actions. Interface objects do not have weight or thickness; they are
pixels that can be moved or copied in ways that represent real-world task objects
with feedback to guide users. Finally, the designer must make the interface
actions visible to users, so that users can decompose their plans into a series of
intermediate actions, such as opening a dialog box, all the way down to a series
of detailed keystrokes and clicks.