It applies shadows to elements based on z-depth value, emulating depth.The ThemeShadow type can be applied to any XAML element to draw shadows appropriately based on x, y, z coordinates. However, you can manually include shadows in your UI by using either the ThemeShadow or the DropShadow APIs. If you use standard controls, shadows are already incorporated into your UI. Using too many shadows will decrease or eliminate the ability of the shadow to focus the user. In Windows apps, shadows should be used in a purposeful rather than aesthetic manner. Elevated objects in your UI don't need to have shadows, but they help create the appearance of elevation. The higher the object, the larger and softer the shadow becomes. Light above an elevated object creates a shadow on the surface below. Shadow is one way a user perceives elevation. By moving UI elements closer on the z-axis, you can establish visual hierarchy between objects, helping users complete tasks naturally and efficiently in your app. For example, if you bring an element closer to the user, then the user will instinctively focus on the element. We can apply this spatial instinct to digital UI as well. In the physical world, we tend to focus on objects that are closer to us. This is so that we can achieve the feeling of depth without sacrificing the performance of your app's UI. However, the shadows are emulated they are not displayed in the true 3D sense. To achieve this, the z-axis provides an easy coding path. Windows apps use shadows to express depth and add visual hierarchy. Think of it as a similar concept to x/y coordinates, but in the z direction. It illustrates how close an object is to the viewer. Z-depth is a term used amongst 3D app creators to denote the distance between two surfaces along the z-axis. This article discusses how to create elevation in a Windows app by using z-depth and shadow. Elevation, the act of bringing select elements of your UI forward, is often used to achieve such a hierarchy in software. Creating a visual hierarchy of elements in your UI makes the UI easy to scan and conveys what is important to focus on.
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