Plotting with sliders



Hello!


I want to draw graphs with sliders like the last 3 examples on the
plotdf manual:
http://maxima.sourceforge.net/docs/manual/en/maxima_66.html#SEC255

But I couldn't find any way to do that with plot2d. I tried looking for
the openmath documentation but it doesn't seem to exist.

How do I draw that kind of graphs for "normal" functions?



Thanks,
Ismael