Unlike most video games, Injustice 2 was released for both PlayStation 4 and Xbox One. Because they were released on two separate consoles, there are different controls for each given type of action. Directly below is a chart for both systems for the main controls found in Injustice 2:
PS4 Main Controls
Light Attack - Square
Medium Attack - Triangle
Heavy Attack - Cross
Character Power - Circle
Throw - L1
Flip Stance - L2
Interact - R1
Meter Burn - R2
XB1 Main Controls
Light Attack - X
Medium Attack - Y
Heavy Attack - A
Character Power - B
Throw - LB
Flip Stance - LT
Interact - RB
Meter Burn - RT