Engraved plates are a beautiful and elegant way to add a few words that show the significance of the thing you are framing. An engraved plate can tell who the person is in a photo portrait. It can give the artist and title of a painting. It can pull together a collection of photos in a collage to give the collection significance. It can describe why artifacts are in a shadowbox.
With engraved plates, keep it short. Too much information is not likely to be read by a viewer, but the right few words can help highlight the significance of your art or object. Take a look at these examples to see what is possible.