Using Wacom Intuos3, Photoshop Opacity and Pressure Sensitivity?

I just hooked up my Wacom Intuos3 to my Macbook Pro (Leopard). Photoshop CS3.

I understand there is a setting (somewhere, I sure can't find it) that tells Photoshop to adjust the opacity of a color/stroke based on the pressure you apply to the pen on the tablet.

This is something I'd really love to use. Can someone help me figure this out?

Thanks!

"Forrie" wrote in message

I just hooked up my Wacom Intuos3 to my Macbook Pro (Leopard). Photoshop CS3.

I understand there is a setting (somewhere, I sure can't find it) that tells Photoshop to adjust the opacity of a color/stroke based on the pressure you apply to the pen on the tablet.

This is something I'd really love to use. Can someone help me figure this out?

Thanks!

in the brush tool palette