The **Display** APIs present the window layout of an application. The display attributes include the display ID, name, active status, state, refresh rate, rotation angle, width, height, pixel density, font scaling factor, and exact physical dots per inch.
## Basic Concepts
**Display**: a screen visible to an application. It can be used as a window container. It is an abstract concept that is different from a physical screen.
You can specify a display device to take screenshots, with screenshot parameters specified.
## Available APIs
For details about the APIs, see [Screenshot](../reference/apis/js-apis-screenshot.md).
## How to Develop
Call **save(options?: ScreenshotOptions): Promise<image.PixelMap>** to take a screenshot. In this API, **options** is a predefined screenshot parameter. If **options** is unspecified, the entire screen is captured by default. An example code snippet is as follows:
```js
importscreenshotfrom'@ohos.screenshot'// Import the module.