If you do a Find and replace on a single file, you get options to "find", "replace", "find all" and "replace all". This means you can interactively review every replacement that is going to happen in a file.
However, if you do Find and replace across files, you only get "find" and "replace" (which are implicitly "find all" and "replace all"). This means you can't interactively review changes -- you have to make all the possible changes, then go back and review them.
It would be nice if the feature set of find and replace on a single file were also available over multiple files.
Customer support service by UserEcho