1. oven preheating is to select your baking mode, and start the oven in advance to make the oven reach the preset temperature. For example, the baking temperature is 2℃. At this time, the oven should be set to 2℃ and turned on. At this time, the oven should be heated from -2, and this process should be preheated.

2. Before the baking tray is put into the oven, set the oven temperature to 17 degrees and start it (set the time for 8-12 minutes). Pre-heating time (only estimated), when the pre-heating is finished (reaching 17 degrees), put it in the baking tray and reset the time (baking time is 1 minutes).

3. For example, when baking cookies, the preheating temperature is required to be 19 degrees. Before putting cookies into the oven, turn on the power supply of the oven, adjust it to 19 degrees, let the oven dry for a while, and when the inside of the oven reaches 19 degrees, put cookies into the oven for baking.