Storage iPad vs iCloud - how to offload iPad storage to iCloud

Hi there

I have 32GB iPad and it is constantly full while I have plenty of space on my iCloud. I have synched the photos to iCloud and optimised following the standard settings available. Even after doing that, my iPad still shows that I have worth more than 10GB in local storage for photos.

How can I eliminate this local storage of photos completely out of the iPad and keep it all on iCloud??

Is that possible?

Thanks!