For more, see Layer Management
To activate: Layer Manager / Layer Options
Related Tables configured from the Set up Data Sources dialog, may be activated from Add a Relate. Once a relate is added and, hence, active, its data can be queried, and rendered, or exported along with the rest of a layer into a new Shapefile layer. A layer with an active Relate, however, cannot be edited (see, Remove Layer relates)
To use:
Open Layer Manager.
Select layer to which relate will be added.
Activate Add a Relate tool.
Select Relate(s) to be added.
Select OK.