Question How do you make a sprite animation from sprites already separated from sprite sheets?

How do you make a sprite animation from sprites already separated from sprite sheets?

I can make the animation from sprites, but there is no documentation on making a sprite animation from sprites already separated. How do you do that?

Please see png file.

 

Alright, I figured out the problem. The reason the sprites couldn't be dragged into the scene frame from the projects frame is because the sprites all had their Sprite Mode set to Multiple. Once the mode was changed to Single, they could be successfully dragged into the scene frame where the Unity software automatically creates the animation, the controller and animator.