draw2d legend position



the input

draw2d(line_width=3,color=blue,key="1",
        explicit(x^3,x,-1,1),user_preamble="set key bottom");

results in error msg:

Maxima encountered a Lisp error:

 Console interrupt.

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
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plot2d accepts [gnuplot_preamble,"set key bottom"].

Is there a way to do this with draw2d?

thanks for any guidance.

Ted Woollett