Using Word 2010, I've added a custom property to my document, "Something," and I've set the value to "XYZ." Back in the document I hit Ctrl+F9 to insert a reference and I type { DOCPROPERTY [Something] }. Then I go to print-preview and the page is blank. Returning to my document I find my reference is now gone.
What is the proper way to insert a reference to a document property?