If I have linked my Jeppesen electronic chart subscription, how do I add additional Jeppesen chart coverage in ForeFlight?

 

Jeppesen chart coverage is also available for purchase directly through the ForeFlight website, see https://www.foreflight.com/products/jeppesen.

If you purchase Jeppesen coverage through the ForeFlight website, that purchased coverage is "combined" in ForeFlight Mobile with whatever coverage you have activated from your linked Jeppesen account on that device.