What is the correct name for vertical tab separators (see attached screenshot) and how to enable them in Eclipse?

Question

Eclipse

In Sublime they are by default


In NPP too


But in Eclipse they are not.


But since I don't know what these things are called correctly - it's hard to google, and requests like "how to enable vertical lines in eclipse" etc. do not lead to the desired result.

So what is the correct term for these things?
And how, accordingly, to display them in Eclipse?

Answer 1

https://marketplace.eclipse.org/content/indent-guide