A search feature in the report editor would be very useful - being able to find all report components/items with any property containing input search text. An added bonus would be having a filtered or highlighted view of the properties of result items, indicating matches.

Being able to find expressions and other properties where some name/value is being used is a very helpful benefit.

UI functionality like that of the search in the Solution Explorer of Visual Studio, with a filtered hierarchical tree structure result view could work well, otherwise a separate results list might be good too.