Here's a Multi Line Regex for VSCode: [\s\S\n]+? (Source). It comes in handy e.g. when you want to move stuff around in a file, and I use this a lot when refactoring my notes. Let's say you want to use the title tag from your front matter as the first heading:

Example.md:

---
someprop: "foo" 
title: "My Title"
someotherprop: "bar"
andanotherprop: "baz"
--- 
This is my note, it started out without a H1, it should end up with one. 

Use the Search function in VSCode, enable regex and enter this in the search field:

---
([\s\S\n]+?)
title: "(.*)"
([\s\S\n]+?)
---

Then enter this as a replacement:

---
$1
title: "$2"
$3
---
# $2

This transforms our Example.md (and all other files) to this:

---
someprop: "foo" 
title: "My Title"
someotherprop: "bar"
andanotherprop: "baz"
---
# My Title
This is my note, it started out without a H1, it should end up with one. 

---

🗓️ Thu, May 1, 2025 · 🔗