Customize nagios emails how to?

Nagios Nagios Configuration support
1

I want to customized nagios e-mails sent to the user.
For example: I want only one e-mail of backup status instead of getting 20 e-mails for each group;
Any idea please?
Thanks and regards
-Ankaboot.

2

nagios.sourceforge.net/docs/3_0/escalations.html