Screen Layout
Screen design is the way elements such as text, images, buttons and menus are arranged on the display. A good layout groups related items together, uses white space so the screen is not crowded, and aligns elements neatly. The most important items are usually placed where they are easy to see.
Key idea
A good layout: group related items, use white space, align elements neatly, and give priority to important information.
Colour, Text and Navigation
Colour should be used carefully. Enough contrast between text and background makes content easy to read. Using too many bright colours is distracting and tires the eyes. A clear font of a suitable size improves readability. Good navigation uses clear, consistent menus so users always know where they are and how to go back.
Example
A web page with black text on a white background, a menu at the top of every page, and enough white space is easier to read than a page full of red text on a green background with no spacing.
Accessibility
Accessibility means designing screens so they can be used by as many people as possible, including those with disabilities. For example, providing alternative text for images, letting the text size be enlarged, and not relying on colour alone to convey information (because some users are colour-blind). Poor screen design, in contrast, is crowded, inconsistent and hard to navigate.
Remember
Good screen = neat, clear contrast, consistent navigation and usable by everyone. Bad screen = crowded, excessive colour and confusing.