Tables, graphs, charts, diagrams, photographs, maps, and screen shots add visual interest and are often more effective in conveying information than prose alone. Be certain, however, that each visual has a valid role to play in your work; if the visual is merely a decoration, leave it out or replace it with a visual that is more appropriate.
You can create visuals on a computer, using the drawing tools of a word processing program, the charting tools of a spreadsheet program, or software specifically designed for creating visuals. You can also download visuals from the Internet or photocopy or scan visuals from print materials. If your essay is going to be posted on the Web on a site that is not password-protected and a visual you want to use is from a source that is copyrighted, you should request written permission from the copyright holder (such as the photographer, publisher, or site sponsor). For any visual that you borrow from or create based on data from a source, be sure to cite the source in the caption, your bibliography, or both, according to the guidelines of the documentation system you are using.