You have to grab it by the corner ponts to scale.
If the Live update button (2 square, one white with an x over a grey one)is on in the timeline Alt will make it work in wireframe for the transformation. Otherwise the opposite -it transforms in wireframe always, unless you hit Alt.
Shift while dragging the corner scales it equally on all sides.
Alt+Shift will do a combo of the 2.
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Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
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Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com