What are those vertical lines in Notepad++ called? The ones that light up for matching brackets or tags, etc

Question

I'd like an actual term for them. Tab lines?

I can't find a reference to them on google because i don't know what to search for!

I wanna see if there's something like this for Gedit.

Answer 1

What you are probably looking for is called the "Indent Guide".

In Notepad++ 5.9.8 on Windows, it is found under View/Show Symbol/Show Indent Guide.