Pages may be locked for the following reasons:

• Another user is currently working on the page — this prevents changes from being overwritten.
• An admin is moving or managing pages — pages are temporarily locked during this process to avoid interruptions.

The page has been set to a status of “LOCKED” by an administrator to prevent further editing 

• Once the action is complete, the page will automatically unlock and be available again.
• You may ask your admin to check Manage > Manage EDO Page Lock to view the locked pages. 

You can also check the lock beside the page numbers to make sure that a certain page is not locked even to those who are assigned to it: