You have to press the < and > buttons to rotate in Create A World. Hope this helps :)
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You can download the latest version of the CAW from the Sims 3 official website, under Games, Tools, Create a World. Here you can download the latest version which will work with the newest patch, free of charge.
To rotate items in the Sims 3 (Nintendo DS), you just press the L or the R button with the item highlighted. I don't play the Sims 3 on other consoles, though, so this is all I know.
Go to Buy Mode and grab the furniture you want to rotate then press the keys to rotate it.
put a moving platform under it
Press the middle mouse wheel and move your mouse.