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# Appearance Customization

Add Dark Mode support to your app, and use appearance proxies to modify your UI.

## Topics

### Dark Mode

  <doc://com.apple.documentation/documentation/UIKit/supporting-dark-mode-in-your-interface>

### Appearance System

Apply standard themes to the views in your interface.

[`class NSAppearance`](/documentation/AppKit/NSAppearance)

An object that manages standard appearance attributes for UI elements in an app.

[`protocol NSAppearanceCustomization`](/documentation/AppKit/NSAppearanceCustomization)

A set of methods for getting and setting the appearance attributes of a view.


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