The document discusses basic principles of graphic and layout design for online environments. It outlines six key principles: balance, emphasis, movement, pattern repetition and rhythm, proportion, and variety. It also discusses eight common design mistakes to avoid such as perfect symmetry, not enough white space, too little repetition, center-aligning text, too much text in one line, poor kerning, font and color overkill, and using raster images. The document provides a short graphic evaluation test to assess understanding of the principles.