hi steeve, It is better if you can read the veritas book so that you can get a better idea of initial configurations. Anyway I'll explain you how to do it simply, then you can do it your self.
(Veritas 10) Go to tools --> Configure alert categories
There you can find number of alert categories and the actions need to be taken. You can select either action you need for each categories
Hope this helps
---Cheers
shirmal