Trying to set up Marlin on my printer and had a quick question.

Trying to set up Marlin on my printer and had a quick question. What are all the temperature sensor in the code for and which ones do I use. I just have a 1 for the hotbed and one for the extruder. Guessing its the hotbed one and sensor zero

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It says right in the comments which ones are which.

Ya i see what numbers I need to use for my sensors but why is there 4 sensors being defined. Which one is set for the extruder. Do I set sensor 1 and 2 to a zero value

4 sensors are there in case you have a tri-extruder setup. Look in the defines…there’s an “unused” you can set. Set them on unused sensors! So temp sensor 1 and 2, set to unused.

Alright cool. Thats what I was thinking about doing but wanted to check