      def __init__(self, parent, tabname, helptext, waittime, command=None):
          DisplayPage.__init__(self, parent, tabname, helptext)
  
          self.display_item = None
  
          self.set_info_text()
          self.add_options()
          parent.select(self)
 
</s> remove     def __init__(self, parent, tabname, helptext, waittime):
 </s> add     def __init__(self, parent, tabname, helptext, waittime, command=None): </s> remove         get_images().load_latest_preview()
 </s> add         size = 256 if self.command == "convert" else 128
        get_images().load_latest_preview(thumbnail_size=int(size * get_config().scaling_factor),
                                         frame_dims=(self.winfo_width(), self.winfo_height())) </s> remove     def extract_tabs(self):
 </s> add     def extract_tabs(self, command="extract"): </s> remove         PreviewExtract(self, "preview", helptext, 5000)
 </s> add         PreviewExtract(self, "preview", helptext, 5000, command) </s> remove         logger.trace("Loading preview image")
 </s> add         logger.trace("Loading preview image: (thumbnail_size: %s, frame_dims: %s)",
                     thumbnail_size, frame_dims)
        self.command = command
      def __init__(self, parent, tabname, helptext, waittime, command=None):
          DisplayPage.__init__(self, parent, tabname, helptext)
  
        self.command = command
          self.display_item = None
  
          self.set_info_text()
          self.add_options()
          parent.select(self)
keep keep add keep keep keep keep keep
 GUI: Show more previews for extract and convert 
lib/gui/display_page.py