This is possible but not always easy. When you take your dog out to the area where you want her to pee, tell her "Go pee" (or whatever command you want to use) and then when she does give her a treat and a lot of praise.
She should eventually get the picture. If you take her right back in as soon as she urinates, she is less likely to want to go right away. (Dogs will learn that when they pee they have to go in the house, so they start holding it longer.)
Do not forget that you need to take her out more often. You cannot just open the back door and let her out, so expect to take her for a walk three or four times a day.