Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.

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Lock Diagram

If User Security is not enabled, to protect a diagram against inadvertent changes such as moving or resizing elements, you can lock the diagram. If you or any other users select any object on a locked diagram, the object's border or outline displays in red.


Context Menu

Right-click on the background of open diagram | Lock Diagram


  • This does not apply in the Corporate, Business and Software Engineering, Systems Engineering and Ultimate editions if User Security is enabled; in this case, see the Lock Model Elements topic
  • To unlock the diagram, select the 'Lock Diagram' menu option again

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