$blogBkgImage
Type: Background override
Scope: self (maybe children)
Purpose: Overrides default image in Styles Dash > Theme Folder
Using BKG-IMAGE will activate BodyImage.png the fixed background image stored in your Theme Folder. To override this image with another, set $blogBkgImage to the name of any image file in your current Theme Folder.
To pass this override on to the note’s children, add BKG-BEQUEATH to its background export option set.
To activate the default background image for your entire website, add BKG-IMAGE to the $blogExpOpt of normal_note.
To activate an override background image for your entire website, add BKG-IMAGE to the $blogExpOpt of normal_note and set its $blogBkgImage.