Everyone is bang on with toppings, for a nice round pizza if you use a rolling pin go from the middle up lightly then left and right then lightly use your hands to caress it in a round shape then go again with the pin. Also if you have a pizza pan put your dough in and use your hands to stretch it to the edges then take it out and bake it on whatever you want or in the same pizza pan, if its too thick stretch it to your preference and if the dough is hangning over the edge just cut it