F10 - Navigator Options/Permissions
This function, located at the bottom of the Navigator application listing for all three of the NAV menu options (NAV 1, NAV 2 and NAV 3), allows you to limit access to Navigator Wide information; such as Sales Statistics.
These options/functionality are present throughout several Navigator applications so these settings are global across Navigator.
Sales Statistic information is available from almost all of the Navigator applications when an item is clicked.
The option Allow Show / Hide on Ak and IN allows you to decide which order lines can be suppressed from printing on order acknowledgments and invoices. It is accessed at the line level via the options arrow to the left of an order line.