I am teaching an Honors Colloquium (1 hour class) in the spring on science fiction and fantasy. Colleagues create posters and advertise their classes, so I realize I need to do that too.
I’ve never made an advertising poster (besides just printing on a piece of paper).
A good link on making posters from PowerPoint, by the University of Alabama. It’s for research posters, but most of it works for advertising, too.
Cost looks higher than I expected ($13-20 each) when I look for printing. I should ask my colleagues where they do theirs.