The character and function of the poster
Posters are used to bring a message to our minds and allow us to develop our own opinions of things. They can also be used to promote products or people and and also provide entertainment. Sometimes posters can bring awareness to political situations occurring or problems happening in the community. Posters are printed in large quantities to allow lots of people to see them. Posters are a popular way of communicating messages to the public and sparking interest among viewers. A poster should convince and motivate the person looking at it. It should accomplish a economic, cultural, political, or social purpose. Posters should also lead the viewer to the product or message being advertised and should make the viewer a positive attitude about the message or product.
The laws of poster-designing
Now that you know the basics of what a poster is used for and why we use them you should also know what "laws" are applied when creating a poster of your own. You want your poster to be an attention grabber and strike interest among viewers. You want viewers to react to it and stand and read what your poster is all about. There is no real secret tip on how to get every person to stop and read your poster. You need to make a poster that draws all viewers attention. It should be flexible to all ages, characters, level of education, etc... You don't want your poster to only appeal to a certain group. Sure you can have a target audience but you want lots of people to find some message, purpose, or takeaway from the poster as a whole.
General laws
Here are a few general pieces of advice that may allow your poster to be universal. Your poster needs to be legible and have a clear message, must arise interest, must be well thought out and planned, designed with a large shape so it is effective at great distance, and when close to the poster it must provide impulse, and last but least the poster should be memorable. You want the poster to be in the viewers mind and spark the viewers interest enough to make the viewer continuously think about your poster.
Lettering
Here are some specifics laws in lettering that make your poster look better. You want your lettering to present information that is easy for a person who is walking to grab. You want people who are not willing to stop to be able to at least gather some information. You also want your lettering to be at a six that is legible at a distance but not to big when close up. The information must be brief but details, simple, and identical to the pictorial part so that it increases the communicative effect.