Tutorial on using Kate to edit HTML?

[Richard Owlett]

I've been referred to https://docs.kde.org/stable5/en/kate/katepart/
and particularly 
https://docs.kde.org/stable5/en/kate/katepart/highlight.html .

They, and https://docs.kde.org/stable5/en/kate/kate/ , go into very fine 
gained detail about a plethora of tasks Kate can trivially handle.
BUT, where is the one I need?

Example 1
While browsing one of the above references, I saw a reference to using 
parentheses. [can't find it now]
When at an opening parenthesis it described how to move the cursor to 
the matching closing parenthesis. Interesting but not of immediate use.

However when editing an existing HTML file with <div ...> </div> pairs, 
there is a blue triangular dingus to the left of the line containing the 
opening <div ...>. Clicking on the dingus will hi-lite text from there 
to the presumed matching </div>. What is that called? Where is it 
described? Can I move the cursor there?

Example 2
The HTML files(chapters of KJV Bible) I work with can have some very 
long lines. One line can run from ~1k characters (Job 25) to ~32k 
characters (Psalm 119).

When manually editing those files, it would be convenient for the editor 
begin each verse on a new line.

In Pluma a trivial search and replace operation. Replace all occurrences 
of [ <span class="verse" ] with [ \n<span class="verse" ].

How to discover how to do it in Kate?

Note: While defining what needs to done, Kate's manual mode is 
excellent. As there are ~1000 Bible chapters, I'll want to do this in a 
command line script eventually.

TIA