The document discusses principles of interactive design: Consistency - key elements of designs and layouts should remain the same to avoid distracting users and keep them focused on their tasks. Visibility - interactions should be obvious and easy to find rather than hidden or accidental to discover. Learnability - interfaces should be simple enough that users can learn the interactions in one use and easily come back to them later. Predictability - users should know what to expect after interacting with something, like what the next screen will be, to save them time figuring it out. Feedback - users should receive acknowledgment of their interactions and outcomes to guide their use but not be overcomplicated.