Design Specifications and Guidelines - Visual Design
What we see influences how we feel and what we understand. Visual information communicates nonverbally, but very powerfully. It can include cues that motivate, direct, or distract, so you want to ensure that every element in your application's user interface communicates effectively. This chapter contains presentation guidelines that you can apply to enhance the design, style, and layout of graphics and text in your application interface.
Fundamentals of Designing User Interaction
Design Specifications and Guidelines