Frequently asked questions - Base
You can do this with a form created via the Form Wizard, because it automatically inserts a navigation bar at the bottom of the form.
In the form navigation bar, one of th icons represents a grid called Data as table which shows up as the mouse cursor passes over it.
If you click on this icon, the form window is divided in two, and you will see in the upper section a representation of the data from the underlying table with all of its associated data, the current tuple or record being indicated by default by a little arrow on the left of the grid representation.
Clicking on the same icon again in the toolbar returns the user back to the default form view.