Item-level security is a second layer of more customized security on top of the permissions that belong to a security profile. Use it to specify the items users belonging to a security profile can view, edit, or delete. You can apply it to libraries, job groups, assessments, resource categories, and scales.
Each security profile has item-level security defaults that only apply to new items. The defaults for a security profile might have add, view, edit, and delete turned on. This means that if you create a new library, users on that security profile can view, edit, and delete that library. If you want them to edit other libraries but not this one, you could go to the library and turn off the edit permission for that profile instead of having to turn off the Manage Libraries permission which would prevent editing all libraries.
Step 1. Go to an item
Navigate to the manage page for Libraries, Jobs, Assessments, Learning Resources, or Scales.
Step 2. Choose apply security
Point to the item's gear icon and select Apply Security or click the shield icon .
Step 3. Select a security profile
Select the security profile you want to apply item-level security to in the drop-down.
Step 4. Select item-level permissions
Select or deselect view, edit, and delete and then click Save.
To edit the defaults on a security profile, go to Security Profiles, click the profile shield icon . Click the Defaults button on the right side of the page, make your changes to the defaults, and click Save.