Selecting the aircraft that you want to model is the first step in the process of defining a mission. The aircraft type currently being used for the mission is displayed in the Aircraft field.
To choose a different aircraft model, click 
to open the Select Aircraft window and then browse the aircraft catalogs to select an aircraft to use in the Mission.
To customize specific parameters - including performance models - for the selected aircraft, click 
to open the Aircraft Properties window.
You can edit the aircraft's station and fuel configuration for the mission by clicking 
to open the Configuration window. Changes made in the window when launched using this button will be applied only to the current mission, and will not be saved to the catalog copy of the aircraft.