> For the complete documentation index, see [llms.txt](https://docs.jmapcloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jmapcloud.io/en/jmap-ng/jmap-ng-user-guide/data/data-layers/styles.md).
# Styles
Layers can have different styles: the appearance of features varies based on one or more attributes.
When a layer has multiple styles, the number of configured styles is shown on the layer icon. You can display multiple styles simultaneously, and styles can vary depending on the map scale. You can also modify a layer's style to customize it to your preference.
## Displaying a Layer's Styles
1. Click the layer icon or click then **Styles**. The **STYLES** panel displays the layer's styles with their legend and the transparency control tool.
2. Use the slider to modify the layer's transparency level. The [Transparency](#transparency) section provides details on this function.
3. Use the toggle to enable or disable each style. The appearance of features changes according to your selection.
4. Uncheck one or more classes or categories of the style to hide features in those classes.
5. Click the collapse/expand icon to close or open the style card.
6. Click **Back** to return to the **Layers** panel.
## Transparency
You can modify the layer's transparency using the slider. This function, available for both vector and raster layers, is useful for quickly viewing information displayed beneath the layer.
The transparency scale goes from 0 (0% transparency) to 100 (100% transparency).
By default, the slider is positioned to the left of 0 (before 0). In this position, the transparency configured for the layer's styles is displayed. Each style has its own transparency value.
When you drag the slider between 0 and 100, the transparency value changes for all styles in the layer, except for selected features, which remain unchanged.
It overrides all transparency settings that may be defined in any style of the layer (except the selection style).
{% hint style="info" %}
Changes to a layer's transparency are lost when you close the JMap NG session. You can save them in a [custom map](/en/jmap-ng/jmap-ng-user-guide/fonctions/creating-and-managing-custom-maps.md).
{% endhint %}
## Modifying a Layer's Style
You can modify the styles of a vector layer. You can modify each class or category of styles independently.
{% hint style="info" %}
Modifications are not permanent and are lost when you close your JMap NG working session. You can save the map with the custom styles by creating a [custom map](/en/jmap-ng/jmap-ng-user-guide/fonctions/creating-and-managing-custom-maps.md).
{% endhint %}
Depending on the feature geometry you can modify:
**Lines**: You can modify the following parameters:
* Color
* Pattern
* Dash
* Opacity
* Thickness
**Polygons**: You can modify the following parameters:
* Fill
* Color
* Pattern
* Transparency
* Border
* Color
* Dash
* Opacity
* Thickness
Text cannot be modified.
**To modify a style:**
1. Click the layer icon or click then **Styles**. The **STYLES** panel displays the layer's styles with their legend.
2. Click the style you want to modify. The style parameter editing window opens.
3. Modify the style parameters.
4. Click **Modify** to save the changes.
5. Click **Back** to return to the Layers panel.
---
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