Word has had a highlight feature for many years. I know that I was using it on Word / Office 2000, and I’m using it now on Office 2016. So highlighting is not a problem; you can do that, but you might not have seen it on the main ribbon / menu. It’s there.
The advice about using Ctrl-H and using it to locate the highlighted areas is fair; it works. But they gave bad advice after that.
After you have used Ctrl-H to “find” highlighting – or maybe even instead of that method – you can use Alt-E, F, the old-fashioned / traditional way to find text and formatting, and that method does produce a dialog box that enables the “Find In” button that is missing from your screen using the Ctrl-H method. (Using Alt-E, then F to find text also obviates the very real danger of “replacing” your found text with “nothing” if you use Ctrl-H and aren’t careful about it, because using that method doesn’t activate a “replace” feature. The old-fashioned “replace” method was Alt-E, then E.)
I’m surprised that they made such an obvious error in an otherwise good writeup.
The rest of the advice works pretty well, though.
Here’s another tip:
If you’d like to make a “practice” document with a lot of text – and not have to write it yourself – you can easily do that in Word by typing
=rand( x, y) and then Enter, where X = # of paragraphs desired and Y = # of sentences desired per paragraph
When Word sees that command / phrasing, then it extracts already-written “actual text” from some Help screen (I’ve never bothered to check exactly where it comes from) and pastes that into your document. They used to do it with meaningless Lorem Ipsum gibberish, but I like the new “real English text” feature much better.