Object Locking 
The Portal Content Studio allows you to create, edit, delete, export, and import objects. A locking mechanism prevents multiple administrators from performing these actions on the same object simultaneously.
You can:
Set the duration for which objects are locked
Check which users currently have which objects locked
Check which objects are locked in which folders of the Portal Catalog
Display and unlock all locked objects in the Portal Content Directory (PCD)
Set up the system so that users can unlock their own locked entries
The object locking mechanism is not yet available for all portal editors and objects. For example, locking is not yet possible for portal desktops and for themes.