1. Conceptual elements, the so-called conceptual elements are those that do not actually exist, not visible, but people's consciousness and can feel things. For example, we see the sharp corners of the figure, feel a point on it, the outline of the object has an edge line. Conceptual elements include: points, lines, and surfaces.
2. Visual elements: conceptual elements are not reflected in the actual design, it will be meaningless. Conceptual elements are usually embodied through visual elements, which include the size, shape and color of graphics.
3. Relational elements: how visual elements are organized and arranged on the screen is determined by the relational elements. Including: direction, position, space, center of gravity and so on.
4. Practical elements: the meaning, content, purpose and function of the design.