# Z-order Control

The **zIndex** attribute sets the z-order of a component in the stacking context.

>  **NOTE**
>
>  The APIs of this module are supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.


## Attributes


| Name| Type| Description|
| -------- | -------- | -------- |
| zIndex | number | Hierarchy of sibling components in a container. A larger value indicates a higher display level.<br>Since API version 9, this API is supported in ArkTS widgets.|


## Example

```ts
// xxx.ets
@Entry
@Component
struct ZIndexExample {
  build() {
    Column() {
      Stack() {
        // Components are stacked. By default, the component defined later is on the top. A component with a larger zIndex value is displayed before one with a smaller zIndex value.
        Text('1, zIndex(2)')
          .size({ width: '40%', height: '30%' }).backgroundColor(0xbbb2cb)
          .zIndex(2)
        Text('2, default zIndex(1)')
          .size({ width: '70%', height: '50%' }).backgroundColor(0xd2cab3).align(Alignment.TopStart)
          .zIndex(1)
        Text('3, zIndex(0)')
          .size({ width: '90%', height: '80%' }).backgroundColor(0xc1cbac).align(Alignment.TopStart)
      }.width('100%').height(200)
    }.width('100%').height(200)
  }
}
```
Display of child components in the **\<Stack>** component when **zIndex** is not set

![nozindex.png](figures/nozindex.png)

Display of child components in the **\<Stack>** component when **zIndex** is set

![zindex.png](figures/zindex.png)