Sketch plane view snap

Hi all,

I just moved to 2009 sp 2. When I create a sketch I select thesurface (top plane) and the grid appears. I then set orientation totop view. I know I can set SW up so the view (in this case top)moves automatically once I select the face to sketch on.
I can't find how to set this up.

Thanks,
RobSolidworksParts And Features