def fit_to_page?
      return false unless self.instance_values.keys.include?('page_setup')
      page_setup.fit_to_page?
    end
Indicates if the worksheet will be fit by witdh or height to a specific number of pages.
To alter the width or height for page fitting, please use page_setup.fit_to_widht or page_setup.fit_to_height.
If you want the worksheet to fit on more pages (e.g. 2x2), set {PageSetup#fit_to_width} and {PageSetup#fit_to_height} accordingly.
@return Boolean
@see #page_setup