Read-only mode

In the read-only mode, you cannot modify documents; you can only read them. There are many circumstances when you might work with documents in the read-only mode:

You cannot add or delete new pages or page revisions, add annotations or redactions, or modify the document index for a read-only document. If you open a document as read-only and then decide to make changes to the document, assuming that another user has not checked out the document, you can check out the document by selecting Check Out from the Document menu.