How to Select an Object in a Photo and Paste It Into a Tax

The a can select an object in a photo and lift it out of the photo. You can do m and quin's been doing it a bunch on twitter, and it looks like it works. It seems to be working with whatever photo you throw at it. The next level version of that is live objects, where you're just on a,. i don't even know. I need to figure out how this works to play with a little bit.