From the Task Console.

Geometry is accessible from the Actions buttons on the left of the Task Console table. Any task of Kind ForgeRevitMasterExtract or ForgeRevitGeometryExtract will have geometry that can be viewed and downloaded. (NOTE: RFA files do not support Geometry Export. ForgeRevitMasterExtract and ForgeRevitGeometryExtract will not work with RFA files)

Click the Geometry Button.

View in 3D

Left Click to Rotate Your model. Use your mouse wheel to zoom in.