How do I train my dog to pee and poop in a fixed spot?

Training a dog to relieve itself in a fixed spot requires a few steps. First, choose a toilet location and keep it away from where the dog rests and eats. Second, train the dog through rewards and corrections: if it uses the designated area, reward it promptly with verbal praise and treats; if it urinates around the house, correct it promptly, for example by making it stand in a corner.

But avoid punishing the dog while it is in the middle of urinating, so it does not mistakenly believe that relieving itself is not allowed.