How do I know which transforms are used in the validation set, and how do I add my own?

fastai
1

I want to know exactly which transforms are applied to the validation set during training.

How do I know this?

For some transforms, it is explicitly mentioned how that transformation behaves in the validation set. For example, the OldRandomCrop docs, it is explicitly mentioned that-

On the validation set, we take a center crop.

But this is not true for Zoom transform. There’s no information on how it behaves on the validation set.

How do I get a list of what transformations are used in the validation set during the training, and equally importantly, how do I customize them and add transforms of my choice?