Drawing Circles in Dia

[Jingzhao Ou <jasonou yahoo com>]

Hi,

I know how to draw ellipse in Dia. However, can anyone
tell me how to draw circles? 

I used to use Visco. When drawing ellipse, you press
the Shift button, it will keep the ellipse a circle.
Does dia have such function? 

Thanks a lot!

Best regards,
Jingzhao

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