An important skill of tuning alerts in OpsMgr is to know where to go and what tools to use when you need to have a more granular experience of managing your overrides.
In the Managing management packs section of Chapter 5, Working with Management Packs you learnt about the excellent community tools from Microsoft's Boris Yanushpolsky and one of those tools that comes in handy when managing your overrides is the Override Explorer. Using this tool, you can connect to an OpsMgr management group and view all the overrides in your environment along with having the options to change the override target, delete the override or simply move it to another management pack. With Override Explorer, you also have the option to export your overrides to an Excel or XML file for later reference.