Project managers needs to understand: 1-Make it easy for people to interact with content. 2-Make it easy to focus on the main task by elevating important content or functionality. 3-Use visual weight and balance to show users the relative importance of onscreen elements. 4-People tend to be unaware of the navigation experience in an app unless it doesn’t meet their expectations. Your job is to implement navigation in a way that supports the structure and purpose of your app without calling attention to itself. 5-Incorporate a brand’s assets in a refined, unobtrusive way. 6-Pay attention to color contrasts in different contexts. 7-Every word you display in an app is part of a conversation you have with users. Use this conversation as an opportunity to provide clarity and to help people feel comfortable in your app. 8-Aesthetic integrity doesn’t measure the beauty of an app’s artwork or characterize its style; rather, it represents how well an app’s appearance and behavior integrates with its function to send a coherent message.