Question How can I create a sprite "image" from a PSB file that contains the many layers of a sprite?

I have a character in a PSB file that was created in different layers (layer for the body, left leg, right leg, etc.)
Everything is positioned where it should be in the file (all the parts are in the right place to create the character's image).
I drag the file into my Project (Textures folder), and when I turn on the Skinning Editor, all the parts are where they should be, and I can add a skeleton and animate it accordingly.

So far, so good.

Now while this gives me a nice sprite I can animate, here is the problem: I also want a separate "picture" of this sprite for use on a UI button.

I don't want it animated, just the same image you get if you opened up the sprite in the PSB file, in its default pose. Yet I can't drag this "SPRITE" onto the canvas into the button because it's not a sprite. It's become some kind of holding object that contains all the different sprite body parts.

Should I just make .pngs of all the characters and use them for the button sprites instead? It seems inefficent because I already have the "image" of the character, it just exists in pieces in Unity. Any suggestions appreciated, thank you!

 

This is so helpful! Thank you so much Daniel.