You can display transparent models in drawings with Hidden Lines Removed (HLR)
and Hidden Lines Visible (HLV) 
modes.
You can see through transparent bodies in HLR
and HLV display states including components in assemblies and bodies in multibody
parts.
Available
for
High
quality drawing
views
only.
To display transparent
models:
- Click .
- Select See through transparent
components in HLR/HLV.