What is the right format to enter ISA DEV/QNH at Forecasts page? Entering the temperature deviation works OK by entering a sole number, but whatever I enter after / , results in INVALID ENTRY. For example, 6/1016 .thanksVadim Rapp

I can't be certain that that piece of functionality works, I've tried entering the transition level on that page and I get invalid entry also

You can Enter the Transition Altitude on the Performance Page during the Flight.It will be presented as Transition Level on the Descent Forecast Page. Ralf