A map chart is normally built by several different layers. There are a number of different types of layers and each layer type can serve a different purpose in the map chart.

Add the relevant layers to your map chart and configure them to suit your needs. You can add a layer either by creating a new layer and configuring it from start, or you can reuse the settings from an existing layer by duplicating it.

In the Visualization properties panel, next to the map chart top-level name, click the plus sign and select the layer of choice.

You can also right-click the map chart visualization, and from the menu, select Properties.

In the web client, you will see the layers directly in the popover, and can click Add new layer to choose a layer type.

In the installed client, go to the Layers page in the properties dialog, and there click Add to select a layer.

See each layer type for more details about what you need to specify for each type.