Here's the general sign:
COPY: (General sign)
COPY-(from someone on your right)
This sign is "directional." That means you can show who is copying what by the direction and location of the sign.
COPY: As in the sentence, "I need a (photo)copy of this." Or, "Do you have a copy?"
COPY (I tend to use this for the equivalent of the English word "photocopied")
Here's a version of "copy" that means "Xerox or photocopy." As in "I need to copy my syllabus for my class."