Page History
...
To apply an alert template, select the appropriate template from the list. If you do not have an existing custom alert template, you can create an alert template after you add your SQL Server instance, and then apply the template to your server. You may select one or more existing tags from the list, or create new tags by clicking Add Tag.
...
You can open the Add Servers wizard from the SQL Diagnostic Manager Console menu by selecting File > Manage Servers, and then > Manage Servers and clicking Add in the Manage Servers window.
...
You can assign multiple tags to each instance so that the instance appears in several different groups.