To Show or Remove Hidden Lines
In a model, you can remove or control the display of hidden lines, in hidden components and bodies.
Click 
on the Quick Access toolbar. Click one of the following buttons on the list.
on the Quick Access toolbar. Click one of the following buttons on the list.• 
Hidden Line—Hidden lines are displayed in gray. The toolbar button shows dotted lines for clarity.
Hidden Line—Hidden lines are displayed in gray. The toolbar button shows dotted lines for clarity.• 
No Hidden—Hidden lines are removed.
No Hidden—Hidden lines are removed.or
1. Click > > .
2. Under Geometry display settings, in the default geometry display list click Hidden Line or No Hidden Line.
3. Click OK in the Creo Parametric Options dialog box. A message is displayed.
4. In the message box, click No to apply the settings to the current session only.
Click Yes if you want to save the settings to a config.pro file for using later in another session.