There are a few applications that should be installed on any computer - particularily computers of technical people and notepad++ is one of them. Notepad++ is a no-junk, very powerful, super simple text editor that allows very simple editing of simple text, but also marked up html, xml and others. What is best about it, is how fast it loads and how fast it runs - even with large files.
Notepad++ Tips and Tricks
The official website for this software utility can be found at: https://notepad-plus-plus.org/download/