title: can labels be turned off in PDFThumbnailView?
body: <p>MacOS provides a very handy set of classes and objects for displaying PDF documents.</p>
  
  <p>PDFThumbnailView is what's used to display a scrolling collection of thumbnails representing each page of the PDF document managed in a PDFDocument (and visible in a full size PDFView, sitting to the right of my PDFThumbnailView).  This is what my UI (with its PDFThumbnailView and PDFView) looks like:</p>
  
  <p><img src="https://i.stack.imgur.com/2QhPj.jpg" alt="MyPDFThumbnailView"></p>
  
  <p>And here's my question which regards PDFThumbnailView labels (I've circled three of them in the graphic below):</p>
  
  <p>PDFThumbnailView provides a <a href="http://developer.apple.com/library/mac/documentation/GraphicsImaging/Reference/PDFThumbnailView_Class/Reference/Reference.html#//apple_ref/occ/instm/PDFThumbnailView/setLabelFont:" rel="nofollow noreferrer">handy method to change the font of the thumbnail label</a>; but is there a way to actually customize what appears in those labels, or better yet, simply turn that label off completely?</p>