Yes, you can reheat leftover pizza, but you have to do it carefully. Here are the steps to properly heat the pizza:
Remove the pizza from the box: Remove the pizza from the box before placing the pizza box in the oven or microwave. Cardboard box is not suitable for oven or microwave oven.
Oven method: Place the pizza on a baking tray or baking paper to heat in the oven. Preheat the oven and select the appropriate heat setting. Generally, a temperature between 180-200°C will suffice. Heat the pizza in the oven for about 5-10 minutes, the time may vary depending on the temperature and thickness of the pizza.
Microwave method: To heat in the microwave, place the pizza on a microwave-compatible plate. You can maintain the humidity of the pizza by placing a glass of water in the middle of the pizza. Reduce heating time and heat the pizza for 1-2 minutes by heating it in the microwave on low or medium.