How to tune SageMaker Studio Notebooks hardware config?

At the top right of a notebook (near the kernel ) there will be a resource configurations button, you'll be able to choose the instance you want to run the notebook on.

A nice feature of that is that all the instances shares the same EFS mount (SageMaker studio uses EFS for notebook storage) if you save a dataframe to the local disk (EFS) you can change instance type during your work and continue from the place you've been in (Move from a GPU instance to a CPU instance for cost effectiveness / back to GPU for performance)