FLUENT 6 - How to display face normal

How to do vector plot of face normal vectors in FLUENT 6? This can be used, for example, to determine which side the shadow of a wall is facing. The shadow is facing the opposite of the normals.
1. Define the following custom field functions:

2. Dispaly->Vectors
-click on custom vectors
-select ax, ay, and az for x, y, and z components, respectively.
-click on define
-click on close
-select vector name under 'Vectors Of'
-click on display

Or one could just set x, y, and z components of the vector to x-face-area, y-face-area, and z-face-area, respectively, without having to make custom field function.

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