How to use repeated images

I’m stuggling to see how to create outputs that use one image repeated many times. Can someone guide me through the steps that are needed for this?
The key points I don’t understand are these…

  1. Does the dxf file somehow contain this information, or does that format always have to draw each image?
  2. Is there any was to graphically see the master image and which images are the repeats created from it.