Steam edition control changes

I've been away for a while, but now I'm back into FSX. Unfortunately my old FSX Deluxe license no longer worked because I've upgraded computers since the last time I used it, so I had to buy the Steam Edition.
Since starting to play again I've noticed a couple things that are different from what I remember. For one thing, didn't there used to be thrust reversers on some planes? I couldn't find the control command for them.
Since starting to play again I've noticed a couple things that are different from what I remember. For one thing, didn't there used to be thrust reversers on some planes? I couldn't find the control command for them.