As a suggestion, rather than raising this as a question, consider makign it a
Tip/Trick[
^] or an
Article[
^].
The difference is a matter of degree. A small item would be a Tip, a longer explanation of how it works, etc, would be an Article. Given the scope of this, I would suggest a Tip/Trick would probably be appropriate.
Have a look at the Articles and Tips on the site (menu at the top of the page: "Articles") and decide! Good luck!