HI -- It largely depends on what you are wanting to do. If you want it to show then have a drape rod just on the bottom frame of the transome and then have side panel drapes. The best way is to just hang drapes fully over the whole window and transome. .

Here are the usual ways that they are treated: or This is a custom treatment:

If we are talking door a piece of stained glass sized to fit. If it is a privacy issue then see decorative glass overlays. search decorative films. http://www.bing.com/images/search?q=image+of+decorative+films&qpvt=image+of+decorative+films&FORM=IGRE