Designing for spatial computing, like with Apple's Vision Pro, demands a deep understanding of ergonomics, or how people physically interact with their environment. Why does ergonomics matter in spatial design? Simply put, the placement of your content directly affects how users react physically to your design. That's why we want to position objects comfortably in all dimensions.

• Place windows along a natural line of sight. This promotes a healthy and comfortable posture, saving users from unnecessary strain. When you place your own content, consider users’ head direction. This practice helps users see and interact with your content more naturally, whether they are tall, short, standing, or lounging on a couch.
• Remember the interaction distance. Typically, it's better to place content a bit further than arm's reach. This encourages interaction at a comfortable distance and avoids content placement behind users or at extreme heights or lows, which can cause discomfort.
• Avoid sticking content to users’ view. It may feel unnatural and disorienting. Instead, anchor content in users’ space, allowing them the freedom to look around naturally. This careful balance between comfort and an immersive experience is essential in effective spatial design.