Lets talk Backgrounds on your Christmas window displays. This could be the back wall of your window or a back drop that you install.
The purpose of the background is to focus your eye on the display rather than the busy environment of the shop behind.
If you have a back wall this can be painted into seasonal colour to provide interest or you can attach graphics|decals to create the right mood.
Alternatively you can create an effective background to your display by hanging a decorative garland or suspending decorative items from the ceiling.
And, no, it doesn't have to be as fancy as this - but you can see what I mean when I say 'background'