What are the main elements of screen design?
In the case of interface design, these elements are the informational, functional, framing, and decorative parts of the screen. Thoughtful placement of these elements helps to guide and inform your users about the relative importance of the information and functions.
What makes an effective screen design?
Good screen design considers users' eye movements and provides clarity with simple symmetries. An incoherent alignment of different sections, texts, and images can be overwhelming. There should be a comfortable distance both towards the screen edge and between different sections of the screen.