What are these 2 developer possibility about ANGLE?

Are "(1)Experimental : Allow Angle" are the identical with deciding on "(2)Angle Choice"? does i have to activate the #1 even after i choose Angle in quantity 2(like within the image 2)? After choose Angle in quantity 2, a notification seems when i open the sport saying Angle is used(like proven in image 3), isn't this imply Angle already activated? so ought to i nonetheless have to activate no 1??(asking as a result of I can't activate no 1, anybody have thought find out how to activate no 1?)