Documenting a half-century of DIY publishing, “Copy Machine Manifestos: Artists Who Make Zines” opens at the Brooklyn Museum. A tremendous undertaking, more than one thousand artists’ zines and publications emerging from the unruly 1970-2020 North American punk and queer underground are featured. Artist-publishers including Tom Jennings and Mimi Thi Nguyen present their Xerox handiwork and an online archive of selected zines opens access to the rich collection.