OptionallegendOptionalorderComma-separated re-ordering of service layer's 'layer' specification. Layer's not specified in service definition, but in order, are initially invisible. Layers not specified in order, but in service definition, are always visible. Layers specified in both are initially visible. Layers specified in neither are always invisible.
OptionaltitleTitle to be displayed for sub-layer. If false, layer name itself will be used as given in service description 'layers' field. If true, it is assumed a name exists in the layer's GetCapabilities, and that will be used. If Record, it maps the layer name to an arbitrary display name given by the configuration.
Legend image to be used for sub-layer. If false, no image is displayed. If true, it is assumed an image exists in the layer's GetCapabilities, and that will be used. If Record, it maps the layer name to a linked image url.