I got this part, but what indicates & decides what “this item” is when there’s two collections on the screen, and the button with the action that connects to it is at the bottom of screen, out of both collections? Aren’t they all attached to the screen? Does it just choose the first one?
I’m still learning Glide and it’s glossary of terms, so I"ll try to make sense of this and see if I can figure it out 
Thanks for the guidance