The Caption tab contains properties that define a caption for the embedded or linked picture or OLE object when it is published in a printed document. Captions do not apply to content files, so these properties are ignored if you specify a Linked Document file.
File caption
Defines a caption for the file in the Word document.
Note: This caption is only added if the File object is either in the contents of a book, or in a paragraph by itself in the text of a topic.
File caption label
Enables you to choose the type of label that prefixes the caption. Captions are automatically numbered starting at 1 from the beginning of the document for each type.
File caption position
Enables you to choose where the caption is positioned relative to the file in the Word document, either above or below the file.