# Marker Layer

The marker layer displays markers over specified Points of Interest (POI).

The following example demonstrates how to create a marker layer:

[Demo Source](https://demos.telerik.com/kendo-react-ui/map/layers/marker/func/source.txt)

## Tooltips

The Map has a built-in tooltip for markers. To display the tooltip, define a marker tooltip renderer.

The available fields in the marker tooltip [renderer context](https://www.telerik.com/kendo-react-ui-develop/components/map/api/markertooltipcontext) are:

* `dataItem`—The original data item used to create the marker.
* `layerIndex`—The index of the marker layer in the Map.
* `title`—The marker title.
* `location`—The marker location.

The marker tooltip is demonstrated in the example below:

[Demo Source](https://demos.telerik.com/kendo-react-ui/map/layers/marker-tooltip/func/source.txt)