Customizing the Application > Setting Options > To Reset Options to the Defaults
  
To Reset Options to the Defaults
1. In the Creo View Options dialog box, click one of the following buttons:
To reset a specific group of options, with that group open, on the right, click Reset to Default. The default settings are restored.
To reset all options, on the left, click Reset All to Default. All default settings are restored.
2. Click OK to apply the settings and close the dialog box, or click Apply to apply the settings and continue setting options.