Select this option from the List Manager Actions drop-down box to lock a list. Lock a list when it should no longer be updated. A locked list has Read-Only access for all users. Users can review the list, but cannot make any changes or additions. Lists can be locked ONLY by the list owner or a user with Full Access, if the list is shared.
To lock a list:
1. Click the checkbox to select the list to be locked.
2. Select the Lock Selected List(s) option from the List Manager Actions drop-down box.
3. Click .
Locked list