tooltips standards

Hello,

I am adding tooltips to a desktop application and am trying to find out what
the standard/best practice is for tooltips associated with fields. Should
the tooltip appear when the user hovers over the field label, field itself,
both? How long should they hover before it appears? Any online documentation
about this would be super.

Julie

_____________________________________
Julie Stanford
Principal, Sliced Bread Design | www.slicedbreaddesign.com
<http://www.slicedbreaddesign.com/>
650-799-7225