Colour theory
http://www.duplichecker.com/color theory
Oh so colourful. The colour theory is a rhetorical device. The colour theory is used to drag its attention to a specific word or symbol and to emphasize a meaning or message. The colour red have different meanings to different people but in most cases it is well known. Warnings signs or police sirens is a well known sign of danger or right and wrong. Colour theory is used to persuade the viewer to believe it is of greater importance or just emphasize its importance.


Perspective
http://www.enotes.com/topic/Rhetorical_device
Now We can see it from up here. The perspective of a viewer is when you look from a special point of view. The rhetorical device perspective is used to convey its viewer to see a matter or problem from a different view. If you write about the problems that will come in the future and that they will affect you it will give you a new perspective of a matter. The rhetorical device perspective persuades you in new belief or deceives you in thinking of something you never thought of before and give you a new perspective of the problem. Perspective is a strong weapon in terms of advertising since it can change your interpretation.

Contrast
http://en.wikipedia.org/wiki/Contrast_(vision)
This one is black and that is white. The rhetoricL contrast device is the opposite of two things which makes them look stronger. The contrast rhetorical device is used to make one of two opposing ideas to emphasize it and make one look stronger. The environment was once beautiful and in the future it will b sad and ugly. Trees will die, unlike once there were forrest almost everywhere. This would remind people how it used to be and that it was nicer back then. If I had a picture of the past and the present the past would look nicer than if it was alone. Contrasting enhances the meaning of an idea.

Hierarchy
http://writingcenter.colostate.edu/rhetcon.html
Hierarchy is a listing method which is a structure were importance go from top to bottom. The rhetorical hierarchy device is used to list importance of the matters and the first the viewer will see is the most important. When something have a big font and then smaller fonts the bigger font is perceived as more important. This is used to make the viewer look at most important thing first.the rhetorical hierarchy device is used to display so the first thing its viewer see is the one of greatest importance.

Rule of thirds
http://www.digital-photography-school.com/rule-of-thirds
Rule of thirds is the breaking up an image into three parts. The rules of three is the three blocks intersections where the viewers focus and look at the first. Research show that in msn cases your eyes focus on parts of images differently. By putting the most important item in where the rules of three counts the message will be brought through better.