Preheat your oven to 350 °F (177 °C) for 5-10 minutes, allowing it to come all the way up to temperature. When it’s ready, place your pizza on a baking sheet, then place it in the oven for about 5 minutes. Whether you’re heating up a whole pizza or just a slice, the oven is a great way to get a crispy crust with bubbly cheese that’s similar to your original pizza.  If you have a pizza stone, place the pizza on that. It will distribute the heat evenly, resulting in an even crispier crust. For easy cleanup, line your baking sheet with parchment paper before you place the pizza on it.

TL;DR in Indonesian:
Panaskan piza menggunakan oven agar bagian crust tetap renyah.