The properties view of a part provides a way to display and set attribute
values for a part. Every modifiable part has a properties or settings
view that you can open by double-clicking on the part in the Composition
Editor. Even if you don't provide a properties view, VisualAge
creates a default one for you. Opening the generic properties view for
your timer part displays the following:
Note that for length, which expects an Integer value, the generic properties view provides an editable text field. For repeat, which expects a Boolean value, true and false radio buttons are provided.