Heat oven to 400°F. Grease 12-inch pizza pan. Unroll dough; place in greased pan. Starting at center, press out dough to edges of pan. Bake 10 to 12 minutes or until crust begins to brown.
In medium bowl, mix mayonnaise, Parmesan cheese and artichokes. Spread artichoke mixture over pizza crust, leaving 1-inch border. Top with 1 cup of the cheese, the chicken and onions. Top with remaining 1/2 cup cheese.
Bake an additional 12 to16 minutes or until cheese is melted and crust is golden brown.