The actual material being printed on is usually paper which is out of wood, how ever the printer may be made out of metal, and I am confused on which one you are asking about.
Answer:
Yes
Explanation:
I feel like they could help the onlookers of whatever they are taking a picture of to understand, and create more of an understanding of what they are looking at. This could also give lookers insight as to what the photographer was thinking (what they were feeling about the situation) when he/she took the picture
