How to create a marker or arrow to indicate the direction?

Hello,

I have a box in 3D, the dimension is 47.2 in and 35.7 in and I want to use the Hololens2 to visualize an arrow marker on the two top corners toward direction of other side. Just simple arrow marker on the corners, parallel to the service of the box, not perpendicular. For reference, please see the attached image. Thanks.

9756105--1396971--bohl1rw9.png

Thank you, I will check them.

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