Drag and Drop Text
You can now drag and drop text in iOS 11 inside the same app. It's a handy way to move a chunk of text around on the iPhone or iPad. This is similar to the drag and drop between apps.
Select the text you want and then press on it like a 3D Touch. Once you nail the right combination of pressure and timing it will float and you can drag it to another place on your iPhone screen.
This takes some getting used to, but it's handy once you have it figured out.