You check a document out of Oracle WebCenter Content to prevent others from checking in a new revision until you either check in a new revision or cancel the check out. This is useful if you are planning to make changes to a document offline and won't be able to upload the new revision until after you get back online.
Check out a document from the document properties page by selecting Check-out from the menu . The content shows an icon next to the filename to show it's checked out. When the document is checked out, the menu option changes to Cancel Checkout.