How do you get "free codes" for your paid apps on iOS?

Hey. Just out of interest. How do you get those codes to give out to people, so they don't have to pay for your paid app?

Do you have to do this beforehand or after the release of your app?

I believe I saw that option somewhere on the dash board, or at the bottom.

You can set it so you manually release your game instead of auto release. This option is at the bottom.