Wiktionary
pretty pictures
n. (context idiomatic English) Image supplements in a presentation: graphs, charts, etc.
Usage examples of "pretty pictures".
Browsers and search engines are populated with cartoon characters and decorated with pretty pictures (plenty of those damn ads too).
He's not interested in anything but pretty pictures of pretty things.
Lots of pretty pictures for de TV stations, they be happy to show all your Cits what you make happen.