Rotating 3-D graphs

I'm just getting my feet wet with Maxima. How can one rotate and zoom
a 3-D graph created with Maxima? I'm on Ubuntu 7.04 if it matters,
with Maxima 5.10.0.

Additionally, the 3-D graphs seem to be of a transparent grid, which
is rather difficult to see. How can that be turned into a sheet,
coloured as per the height (z-axis value) of the x,y function?

Thanks in advance.

Dotan Cohen

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