To Blank an Object
1. Click > 
Mold Display. The Blank - Unblank dialog box opens.
Mold Display. The Blank - Unblank dialog box opens.2. Click the Blank tab.
3. Set the filter to the necessary object class.
4. Under Visible Components, select the objects you want to blank. Click 
to select items directly from the graphics window or from the Model Tree.
to select items directly from the graphics window or from the Model Tree.5. Click Blank.
6. Click Close.