Heat oven to 375°F. Line large cookie sheet with foil. If using dough sheet: Unroll 1 dough sheet on cookie sheet; starting in center, press into 12x8-inch rectangle. If using crescent dough: Unroll 1 can of dough into 2 long rectangles on cookie sheet. Overlap long sides to form 12x8-inch rectangle; firmly press perforations and edges to seal.