“Gestalt Principles”- PART 1 – pp 96 – 97
Introduces the main principles of Proximity, Similarity, Continuity, Closure, and Symmetry in Gestalt psychology. Explains how these principles affect people’s perception and organization of visual information.
Proximity:
Place related elements closer together to indicate that they belong to the same group or have the same function. For example, group navigation buttons together so that users can intuitively recognize that they are used for page navigation.
Similarity:
Use the same color, shape, size, or font to represent elements with similar functions or attributes. For example, essential operation buttons should be marked with the same color in the software interface so that users can quickly identify and distinguish different types of operations.
Elements in different states can be distinguished by similarity. For example, various colors or styles can represent selected and unselected items. Still, they should maintain a certain similarity so that users can understand their relationship.
Continuity:
Use the principle of continuity to guide the user’s eyes. For example, continuous lines or shapes can be used to connect related elements so that the user’s eyes can naturally follow the lines and understand the overall layout and structure of the design.
In web design, continuous layout and navigation elements can be used to guide users smoothly between pages. For example, a continuous menu bar or breadcrumb navigation allows users to clearly know where they are in the website and where they can go.
Closure:
Use the principle of closure to create concise and expressive graphics. In interface design, only a part of the progress bar is displayed, and users can infer the overall progress based on that part.
Symmetry:
Designing a symmetrical layout can give people a sense of stability and harmony. In fields such as web and APP design, symmetrical layouts can be used to attract users’ attention and convey a professional and orderly impression. For example, important information or action buttons can be placed symmetrically on both sides of the interface so that users can find and use them more easily.

“Fitts Law” – PART 1 – pp 98 – 107
Mainly describes the principles and formulas of Fitts’ Law. Explains the relationship between the time required to move to a target and the distance and size of the target. The application of Fitts’s Law in human-computer interaction, such as mouse operation, touch screen interaction, etc., is analyzed through experimental data and actual cases. According to Fitts’s Law, the user interface design is optimized to improve the efficiency and accuracy of user operation. The user’s operation time and error rate are reduced in specific designs. For example, essential buttons are designed to be more significant and close to the user’s operation area.

“As We May Think, Foreseeing the Future, On the Trail of the Memex”- PART 1 – pp. 70 – 95
The concept and function of “Memex” (an imaginary information storage and retrieval device) are introduced. People can draw inspiration from the idea of “Memex” to obtain personalized information storage and retrieval and associative information organization. In interaction design, users can customize interface layout, information screening conditions, etc., through user portraits and personalized settings to improve the efficiency and accuracy of information retrieval.