Question
What is the background rectangle with the Stack feature about?
I've read a few places in the UXP API and other places that mention a background rectangle in a Stack.
What is this feature and how do I use it?
https://www.adobe.io/xd/uxp/develop/reference/scenegraph/#scenenodelayout--layoutproperties
Object representing layout.padding
PARAM TYPE DESCRIPTION
| background | sceneNode of NULL | SceneNode used as the background or null if no background set |
