A long flight will often transit through several FIS areas. Whilst the frequencies for these will be shown on the PLOG, there is nothing which indicates which frequency is relavant to each leg of the route, and reference to the national AIP or Charts will be required to see which frequency is relevant to any point on a route.

Two things might be helpful:

1) a selectable overlay giving FIS areas, with call-signs and frequencies.

2) including the info relevant to the point being right-clicked/touched in the 'Leg Properties' pop-up window.

Thanks

Graham