The NAV Library contains the data about NAV frequencies you need to use during your flight.
Data inside:
1) Name station
2) Frequencies
To insert in the Main Destination space
1) Choose 'NAV' from the 'Fill Form' menu
...or
1) Click in the insertion icon on the left of the space the NAV Data will be inserted, inside the document.
2) The Nav Dialog will be opened
3) Double click on the name of the NAV
...or
3) Select the name and click the 'Insert' button.
4) You can insert all the frequencies you need.
5) Close the dialog.

(To insert NAV frequencies in the Alternate destination Page)
1) Choose 'NAV' from the 'Fill Form' menu and click in the alternate button
...or
1) Click in the insertion icon on the left of the space the NAV Data will be inserted, inside tha document but in the 'Alternate Destination' page.
...proceed as for the 'Main Destination NAV'