(PECL haru >= 0.0.1)
HaruDoc::setPageMode — Set how the document should be displayed
$mode
   )Defines how the document should be displayed.
modeThe following values are accepted:
HaruDoc::PAGE_MODE_USE_NONE - display the
         document with neither outline nor thumbnail.
        HaruDoc::PAGE_MODE_USE_OUTLINE - display the
         document with outline pane.
        HaruDoc::PAGE_MODE_USE_THUMBS - display the
         document with thumbnail pane.
        HaruDoc::PAGE_MODE_FULL_SCREEN - display the
         document with full screen mode. 
        
   Returns TRUE on success.
  
Throws a HaruException on error.