After a property is defined, it can re-used on multiple classes.

To add a new property:

1. Click the New Property Definition button in the Property Definitions pane.
   
2. Enter a name, a content type (text, hyperlink or email address) and a data type.
   • Text only holds 100 characters; Multi-line holds much more but also takes up more space on the page
   • If you select Choose from List, you must define a value list.
3. Set the value for Allow using this property with the following object type… to Document.
   
4. Click OK.