callouts

[anjelinaponkerat]

Hi

I,m using  callout to display label on the points. but the callout line can not display!!

labelingInfo: [{
labelPlacement: "above-center",
labelExpressionInfo: {
value: "{Description}"
},
symbol: {
type: "label-3d", 
symbolLayers: [{
type: "text",
material: {
color: "black"
},
halo: {
color: [255, 255, 255, 0.7],
size: 1
},
font: { 
size: 6.5,
family: "Arial",
weight: "bolder"
},

size: 6.5
}],

verticalOffset: {
screenLength: 8,
maxWorldLength: 52,
minWorldLength: 10
},

callout: {
type: "line", // autocasts as new LineCallout3D()
size: 1.5,
color: [0, 0, 0],
border: {
color: [255, 255, 255, 0.7]
}
}
}
}],
labelsVisible: true

});