When viewing a Table (or View) in a Diagram, ModelRight lets you display not just Columns, but any type of object that a Table can own.
The options in this tab let you define how the delimiter between the different types of child objects (i.e. Categories) should be displayed. The options in this tab are self-explanatory and demonstrate themselves when clicked.
A Diagram's Category tab in the Property Browser
With the Category Header and Category Separator options, you can either have a "thick" Header with the name of the child object type or a narrow line Separator.
