Lock Lists denies all users access to use the Add (+), Delete (-), or Edit options unless they have the Unlock List setting on their Employee Card.
This Solution describes this feature. (6195)
To enable the Lock Lists feature, open Employee Prefs, click the Lock Lists checkbox, and click OK to save changes.
Then on select Employee Cards, on the Access tab, click Unlock Lists for those users that you want to be able to edit lists.