# 3D Vector Field Doesn't have Arrows

I have been trying to plot 3D vector fields, but I keep running into a problem. The graphic does not have arrows instead it is just lines. Here is the code.

```
var('x,y,z')
p = plot_vector_field3d((x,y,z), (x, -5, 5), (y, -5, 5), (z, -5, 5))
p.show()
```

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