Interface AddLayerOptionsAboveBelow

Where to insert the new layer.

Default: "top"

• "top": Insert the new layer above all other operational layers.
• "bottom": Insert the new layer below all other operational layers.
• "above": Insert the new layer above the specified reference layer.
• "below": Insert the new layer below the specified reference layer.

The layer that serves as a reference point for insertion.

Can be specified either as a layer object or an id.

The reference must be a valid layer in the layer collection.