The objective is to draw circles in the place where the punch holes will be once the PDF is printed in a physical sheet of paper (If it matters, consider a two-hole punch.). Some sources say the holes are usually 0.5 in (1.27 cm) away from the edge of the paper. The closest thing I found was an answer that talks about the
pdfcomment package. I have not tried that, but I think that it might be overkill and that there should be a simpler way.
Written as a more general question: How can you draw/write in the margins?
Software: texlive 2018, macOS.