Our oven seems hotter than what the dial suggests, which causes the crust to become hard and dry. So I follow standard directions - ie

Frozen into preheated oven, on center rack -

Then half way through the cook time I’ll slip a cookie sheet under the pizza. This keeps some moisture in the crust. Finish cooking.

I also use the box as a cutting board and serving plate. Unfold it, use inside surface to cut the pie. Throw away when done.