The View Alert History command is used for viewing the history of changes made to the selected alert in the Alerts tab.
To run this command, right-click anywhere in the canvas and choose View Alert History from the context menu.
The Alert History dialog window opens:

All changes (actions) made to the alert are displayed as a table with the following columns:
Name  | 
Description  | 
CMS Environment  | 
The name of the SAP BusinessObjects environment where this alert applies to.  | 
Alert Name  | 
What was written in the New/Edit Alert dialog window  | 
Action Type  | 
What was made to the alert: modification, creation, so on.  | 
Action On  | 
Date and time  | 
Action By  | 
MetaMiner user account name  | 
Emails  | 
Email address(es) set  | 
Phones  | 
Phone number(s) set  |