How do you increase/decrease the fuselage size???[Filling up the Minimum of 100 Characters]
By opening the file in a design program like photoshop or GIMP and stretch it. You can not move the wings of the aircraft tho as they are set to a standard so stretching is not really a good idea yet.
But can you decrease its size?
no as the wings wound go with the size of the fuselage as far as i know