Ravi Sagar has a quick video that shows you how to bulk-rename tags in an Org file. If you don’t use tags in your Org files, this probably seems like something you’d hardly ever want to do. Indeed, even Sabar doesn’t seem to understand its real use. But if you do use tags regularly, it’s extraordinarily helpful.
I have several Org files—such as my journal and blog queue—that have one or more tags for every entry. If you’re a real person, you probably get confused when specifying tags. Is it grocery or groceries? Or maybe you get confused about capitalization. My tags are (supposed to be) lower case but sometimes habit takes over and I automatically capitalize a tag that also happens to be a proper name. In any event, I often find myself needing to change several instances of a tag in a file.
Sagar shows a snippet of code that allows you to do just that. You specify the name of the tag you want to change and the name you want to change it to and the code takes care of it for you. The code is from Stack Excahnge and is here. Again, if you don’t use tags you’re probably saying, “Meh, who cares” but if you do, you can immediately see the usefulness of the code.