Customizing the Application > Customizing the Ribbon > To Restore the Default User Interface Settings
  
To Restore the Default User Interface Settings
1. Right-click the ribbon and choose Customize the Ribbon from the shortcut menu. The Creo View Options dialog box opens to the Customize-Ribbon page.
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You can also click File > Options. Then, on the left, under Customize, select Ribbon.
2. On the left, under the Choose commands from list, click Reset to Default. The default settings for the ribbon are applied.