I created a library with a collection of graphics that I am using throughout my documents. When I want to use them, I open the InDesign document and the InDesign library and drag and drop the graphic from the library to the document. My problem comes in after I've saved and exited InDesign. When I open the document again, it says that the document contains missing links to those graphics files. What gives? Is there some setting I'm not checking off or something?