Thanks so much for clarifying! Something else that I don’t understand is if in the pre-trained model the class index for car is 7, and when I fine tune the model I assign it the value 1 how does it make the connection that both index 7 in the pre-trained model and index 1 in the fine tuned version both refer to the class ‘car’? Basically I want to understand how the knowledge of the pre-trained model that helps identify a car gets transferred when I finetune the model if there are no connection between the original class ID and the one I make up?