The third step in designing ergonomic office equipment is to apply the principles and best practices of ergonomic design, such as adjustability, affordance, comfort, and compatibility. Adjustability means making equipment adjustable to fit different users, postures, and tasks. Affordance means making equipment intuitive and easy to use by providing cues and feedback that indicate how to interact with it. Comfort means reducing pressure, friction, and fatigue on the users' body parts. Compatibility means matching the design with the users' physical, cognitive, and emotional characteristics. For example, you can design office chairs with adjustable seat height, depth, width, backrest angle, lumbar support, armrests, and headrests; keyboards with tactile and auditory feedback; monitors with buttons and icons that show functions and settings; mice with ergonomic shapes, sizes, and grips; office equipment with appropriate colors, fonts, symbols, and sounds; as well as office equipment with accessible and inclusive features such as adjustable font size, contrast, brightness, and volume.