When I run on the side and try to do a, isn't it called cross-pass or something, when you shoot a high ball
into the box, when I do that I never score on a header (or anything else). I'd like to score on headers
doing that. Should I use the "X" or the "Z" or something on the keyboard, and when should I use them?
Oh, I play on the hardest...

I answered this 2 times by now. So next time plz review the previous posts.
Here it goes, when u r almost ready to throw the center(cross pass) press alt+ctrl+s (pass button+Both skills) when u do that one of your players will run into the middle of the area(u know, where the keeper can grab the ball with its hands) and when its entering the area release the center and your player will be in front of the goalie getting ready to score a nice header(remember to mantain
D pressed during 1 or two seconds for a more powerful header)