Q:

Unity Sprite Editor: Can You Preview A Background Image While Setting Pivot?

I've Googled around a lot, and I checked the Unity Asset store but I cannot seem to find what I think is a common problem (or perhaps I'm doing it wrong).
The issue is when I use the Sprite Editor I cannot see a reference image which is useful for setting the sprite pivot.
When I open the Sprite Editor on a given image file, I cannot seem to add a background reference image:

I want to be able to see a background image (of a specific character for example) that I can position and then use that to set the pivot.
Do you know of any way to do this? Asset Store references are acceptable.
I found one for Animation pivot setting but not for static images.
Any and all suggestions welcome (if you have a workflow suggestion that mitigates this issue, feel free to suggest :) )

A:

I found a free option that works well enough:
http://gnupart.tistory.com/entry/Unity3D-Custom-Sprite-Pivot-Editor-in-SceneView

