in rgba, the alpha part. Can opacity be more than 1

Answer 1

ohhh...so thats why we use decimals....heh

Answer 2

max alpha value is 1

Answer 3

Nope, the opacity is a range of 0-1, any number beyond 1 will just be 100% opacity

Answer 4

No, you cannot use decimals in alpha, other then 0 and 1.
You should use alpha value from 0, 0.1, 0.2, 0.3 until 1. The minimum value 0 is to set fully transparent mode, the maximum value 1 is to set fully opaque color.