How Do I Set Custom Controls

I just started using Construct 2, and the default controls are arrow keys; I know that much already. But when I try to set it so the controls are things like WASD, I change it OFF default controls, but then I can't find out how to customize those controls. I hear about the keyboard thing but I don't know how to use it

There is a keyboard object, double click onthe canvas and add one.

Then you can do onKey and KeyDown for triggering events. Then if you are using behaviours there is a way to mimic the behavior movement in the sprites actions.

I added the keyboard object but I can't figure out how to use it to change the controls

There are tutorials on the construct 2 website and you can check out

https://www.scirra.com/manual/113/keyboard

for more information on each action for the Keyboard object.