To Display Thumbnail Previews in Session File Manager
When the view is set to Session Files view or Reference view, click the Show Preview icon in the upper-right corner of the Session File Manager window.
When this icon is on, previews of the selected document automatically display at the bottom of the Session File Manager window. Click the Show Preview icon again to turn off thumbnail previews for the view you are in.
Note: The thumbnail image preview available from the Session File Manager is not the same as the thumbnail image preview on the Open Document dialog. Session File Manager gets its thumbnail image from the copy of the selected document in your local working directory, whereas the Open Document dialog gets its thumbnail image from the master copy of the document on the server (if thumbnail image display has been configured by your administrator).