• Show Name- specifies that the Name of the underlying Association is shown.
• Show Role Names- specifies that the Names of the underlying Association's Roles are shown.
If you opened the View Options by right-clicking the diagram background, the check boxes you select set the default view options for any Links that are added to the diagram there after.
If you opened the View Options by right-clicking one or more selected Links, the check boxes you select change the view options of those Links.