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textual/docs/styles/layers.md
Rodrigo Girão Serrão c087c93930 Complete references for layer(s).
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2022-12-20 11:16:55 +00:00

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# Layers
The `layers` property allows you to define an ordered set of layers.
Layers control the order in which widgets are painted on screen.
These `layers` can later be referenced using the `layer` property.
More information on layers can be found in the [guide](../guide/layout.md#layers).
## Syntax
```
layers: <STRING> . . .;
```
Layers that come first in the list are drawn before the layers that come after.
This means the first layer will be under all other layers and the last layer will be above all other layers.
See the example below.
## Example
In the example below, `#box1` is yielded before `#box2`.
However, since `#box1` is on the higher layer, it is drawn on top of `#box2`.
[//]: # (NOTE: the example below also appears in the guide and 'layer.md'.)
=== "Output"
```{.textual path="docs/examples/guide/layout/layers.py"}
```
=== "layers.py"
```python
--8<-- "docs/examples/guide/layout/layers.py"
```
=== "layers.css"
```sass hl_lines="3 14 19"
--8<-- "docs/examples/guide/layout/layers.css"
```
## CSS
```sass
/* Bottom layer is called 'below', layer above it is called 'above' */
layers: below above;
```
## Python
```python
# Bottom layer is called 'below', layer above it is called 'above'
widget.style.layers = ("below", "above")
```