At the moment, the program shows two views, a menu bar and a toolbar.
From the list view, the user can visualize every contact registered in the loaded file, with the possibility to configure the fields that will be shown from the records. There is always a selected record that is called the "current record", whose fields are shown in the record view.
The list view is used to perform the actions of selection, sorting and DnD.
To select a card as the currently viewed card, scroll the list view until the desired record is visible and click on it. This will make the record view to show the selected record's information.