For 2D point styles in Layer style 
, use the Callout option to improve the perception of icon locations in the 3D scene. Vertical callout lines connect point markers to the location of the feature they are describing. For example, you can have a scene with callout lines visibly connecting police station icon markers to the top of the police station buildings that are under the icons.
To use the Callout option, do the following:
- Click the Callout toggle button to turn callouts on and off in your layer.
- For the callout options, do the following:
- For Size, choose the length of the callout lines and the height the icons are lifted from their original position. You can choose large or small callout lines. Also set an appropriate scale for your data: city, regional, or world scale. Scales affect how long you can see the callout lines when zooming out.
- For Color, you can make your callout lines either light or dark.