Compared to when security is enabled, locking a model element differs slightly when security is not enabled. If you select the Project | Security | Require User Lock to Edit menu option, when you elect to lock a diagram or element, the Element Lock dialog displays.
The four lock options available are:
|·||No Lock - do not lock this element; clear any existing lock|
|·||Full lock - lock this element so that no-one can edit it|
|·||User lock - lock this element so that only the locking user can make further edits|
|·||Group lock - lock this element so that any member of the specified group (in the GroupID field) can update the element, but others are excluded.|
Select the appropriate lock and click on the OK button.