Creo Direct > Designing in the Creo Direct Environment > To Add Transparency
  
To Add Transparency
1. Click Home > Color. In the 3D mode, select a surface of a geometric model, in the Graphics Window.
To select more than one surface simultaneously, hold down the CTRL key and click to select.
2. The Color Options toolbar opens.
3. Click on the arrow next to and click and drag the slider, to change transparency.
4. Alternatively, type a value in the text box, in the Transparency panel, and press the ENTER key.
 
* To select a value for transparency, from the list of recently used values, click the arrow next to the text box.
5. Middle click to complete.