In Layer style 
, when labels are available in your layer the Labels toggle button displays. By showing labels in your scene, you can immediately convey information about the scene based on an attribute in the layer.
- Click the Labels toggle button to turn labels on and off in your layer.
- You can configure the labels by doing any of the following:
- For Text, click the drop-down menu to choose the attribute for labeling. You can select <custom> when custom label expressions are saved from another app, such as Map Viewer or Map Viewer Classic. Select the positioning of the labels around the markers.
- Choose small, medium, or large for the label size under Size.
- For Color, you can make your text either light or dark.
- For 3D point styles, click the Improve perspective toggle button to display labels more intuitively, with labels farther away having a smaller size.