You can create custom file properties to help you manage and track files. If you link a property to an item in the document, it will update as the item is changed.
For the active document
The value you enter must match the selection in the Type box. For example, if you click Number in the Type box, you must type a number in the Value box. Values that don't match the property type are stored as text.
Linked
to items in the active document
Before you do this procedure, you must create a bookmark for the item in your document that you want to link a custom property to.
If you didn't create a bookmark for the item you want to link to, the Link to content check box is unavailable.