parameters: (self)
docstring: Zoom out the chart.
docstring_summary: Zoom out the chart.
docstring_tokens: Zoom out the chart .
function: def _on_key_down(self) -> None:
          """
          Zoom out the chart.
          """
          self._bar_count *= 1.2
          self._bar_count = min(int(self._bar_count), self._manager.get_count())
  
          self._update_x_range()
          self._cursor.update_info()
function_tokens: def _on_key_down ( self ) -> None : self . _bar_count *= 1.2 self . _bar_count = min ( int ( self . _bar_count ) , self . _manager . get_count ( ) ) self . _update_x_range ( ) self . _cursor . update_info ( )