# How to add an arrow for polyline in czml?

**URL:** <https://community.cesium.com/t/how-to-add-an-arrow-for-polyline-in-czml/1144>\
**Category:** CesiumJS\
**Created:** [April 18, 2014, 7:22am UTC](https://community.cesium.com/t/how-to-add-an-arrow-for-polyline-in-czml/1144 "2014-04-18T07:22:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![researcher\_pim](https://avatars.discourse-cdn.com/v4/letter/r/91b2a8/32.png) [@researcher\_pim](https://community.cesium.com/u/researcher_pim)\
**Post date:** [April 18, 2014, 7:22am UTC](https://community.cesium.com/t/how-to-add-an-arrow-for-polyline-in-czml/1144/1 "2014-04-18T07:22:10Z")

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Hi,All,  
I can create polyline with arrow by set the material by code. However, in czml, there is no example to show how to add arrow. I see the document, Content in CZML, on wiki. Polyline have material property. But no description about how to create such material in Czml.

So, How to do it?

Thanks,  
-Jonathan