The story
From Granger + -ize, after James Granger, an 18th-century English biographer. Granger's Biographical History of England (1769) included areas for readers to illustrate the pages.
Etymology from Wiktionary, CC BY-SA 4.0.
grangerize
Today it means: To illustrate (a book) with material such as images taken from other published sources, such as by clipping them out for one's own use. Full definition →