On the right-hand side of each records are links to records in other tables. These are pathways already set up in the database called foreign keys.
If the link points to more than one record, the handle shows 'List'. Otherwise it shows 'Fetch'. In the example the list handle for the USA is selected, listing its cities

These are the links in the navvy_samples Access (R) database supplied with Navvy. Your database will have other links, and Navvy will detect them automatically
JPEG of Navvy 2.1 Data Grid
Click the 'List Handle' for the record you are interested in.

JPEG of Navvy 2.1 Data Grid

The records in the 'city' table that are related to the USA are fetched and listed in-line. The Navvy philosophy is to display related data together, rather than opening up a new windows.