Customizing the Application > Setting Options > About Locking Option Settings
  
About Locking Option Settings
The Creo View administrator can lock option settings and commands as follows:
Any individual option or the entire option page can be locked. When an option setting is locked, a lock icon appears alongside the setting on the page.
Any command can be locked. A tooltip indicating that the command has been disabled appears when you hover the pointer over a disabled command.
If you have set the environment variable PVIEW_DISPLAY_COMMANDS=1, the Tooltips also show the command ID.
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You cannot disable interface elements such as tabs and groups, but you can disable an individual command, such as Print.