3D Symbols
It is possible to display symbols as 3D images. These are selected in the normal way from Display Options | Annotations | Edit Labels | Edit (Selected Labels) as shown in 3D Symbols#Figure 1 and 3D Symbols#Figure 2.
Figure 1. View3D Display Options: Configuring 3D symbols.
Figure 2. View3D Display Options: 3D triangle symbol.