In the draw package, is there an option to set the axis labels on the
secondary axes? I know I can use `user_preamble', but I'd rather not.
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Also, is there a command analogous to set_draw_defaults that shows all
the options? Something like
(defmfun $get_draw_defaults()
(maphash (lambda(k v) (mfuncall '$print k "=" v)) *gr-options*))
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Leo