The thumbnail image displayed on the Contents List screen does not change. November 25, 2020 05:52 Updated There is data remaining in the browser cache.Refresh the browser. Related articles Content or a thumbnail is displayed in a color tone different from that of the original PDF (document), with a loss of an image, or as a blank page. 4. Creating Content What is the password policy for SMART CATALOG? A "PDF error" appears when importing a PDF file. A modification to content by authoring is not reflected in the content displayed on the device.