Hello, I want to fit multiple peaks using the Gaussian function. The problem is that I remove the function accidentally from the peak functions list.This is preaty much all am I seeing. I don't know how to add it back and I didn't find anything else on google. Maybe because this is not something people usually do. When I press the "add" button I don't see anything in the folder. https://i.sstatic.net/zoU38.png But when I look directly in the folder I see the function right there.https://i.sstatic.net/fQndV.png Maybe it is a Gaussian function for something else, not peak fit. Does anybody know how I can fix this?