Attack 1 and Attack 2 of a unit

[:1]There is one melee unit in my map and has:

attack 1 (which can target only ground units in 100 range), and

attack 2 (which can target ground and air units in a 800 range).

At the start of the game, this unit has only attack 1 enabled. When he acquires an item, an orb perhaps, his attack 2 is enabled and can attack air units at a max distnce of 800 range. my problem is that it still attacks ground unit within 100 range, even though attack two is enabled. so is there a way to disable attack one so that the unit can attack ground units in 800 range? or is there another way for a melee unit to become a range attacker?|||Go to your hero. Go to the line that says "Targets allowed" double click. and check the air box.

Hope I helped!