Hide/Delete STL Models in Display
Remove STL models from the display.
- In the menu bar, click Project ➔ View original STL model.
 - Select file names from the list in the dialog.
 - 
                Take one of the following actions:
                
Action Process Remove STL model from display Click the Close file button. Permanently delete STL model from the hard drive Click the Delete file button.  - Click Close.