icloud photos
I keep seeing tech columnists suggesting that you can free up photo storage space on your iphone by backing up everything to icloud and then deleting photos from your device. But as far as I can see, once you delete them from your phone you *also* delete them from icloud--that is, icloud just mirrors whatever is on your device.
Is there, in fact, a way to keep photos in icloud when you delete them from your phone?
iPhone 6, iOS 12