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-elide => boolean
 Elide  specifies whether the data should be elided.  Elided data is
 not displayed and takes no space on screen,  but  further  on
behaves just as normal data.

sub hide_text {  
   my @r = $text->tagRanges('sel'); 
...
   $text->tagAdd('hide',@r); 
   return;   
}