When you added facts to your person nodes,
you set tooltips on these facts. These tooltips will appear in the
final application. Therefore, you need to be in Preview mode to
see the tooltips.
By default, in the Designer you are in
Style Editing mode. In Style Editing mode, you can define style
rules as you have been doing.
To switch to Preview mode:
-
Click the Preview button
in the
vertical toolbar.
Preview mode shows you the diagram as it
will be in an application. This mode allows you to test the
application behavior.