[?] Override the default square aspect ratio of Contour or Plot3D images?

Questions
1

When one uses the default Plot3D command like:

Plot3D[Re[ufun[x, y]], {x, xlow, xhigh}, {y, ylow, yhigh}, 
 ColorFunction -> "TemperatureMap"]

You get square (x,y) base plane plots. The actual aspect ratio is Aratio=(xhigh-xlow)/(yhigh-ylow). But when Aratio is say 10/1,
it would be nicer to have a rectangular shape base than the default Aratio=1 square one.

Do how to alter the above command to get a user controlled aspect ratio?

Thanks in advance

2

You can use the option “BoxRatios->Automatic” for 3D plots, “AspectRatio->Automatic” for 2D plots. These will give axes that have the same as-drawn scale.

3

I got this reply

“BoxRatios->Automatic” for 3D plots, “AspectRatio->Automatic” for 2D plots.

from an email from community, but I do not see any sign of it yet when I go to community site??

4

Ok now I see the reply from Keith.
Thanks David