You can make a text’s structure easier with the use of text features, such as headers, subheads, sub-titles, etc. Text features can also be used to add information and a visual element to your text, which can be just as useful as the addition of a subhead.
The text feature is a fancy way of saying “a way to say something”. It’s used for many purposes in text. For example, a subhead, a sub-titling, a sub-sub heading, a sub-sub-heading, and a sub-sub-sub heading all work in the same way.
The first is a headline. It is a heading that’s put in the middle of the text. A subheading is a heading that’s put before the first one, and a sub-sub-heading is a heading that’s put before the second one, etc.
A sub-sub heading is not a sub-heading in itself. You can do a sub-sub-heading and not have it be a sub-heading, but it does have to contain a sub-heading.
Sub-sub-sub is a sub-sub-heading which is a sub-subheading which is not a subheading. That is an example of a headline which is both a subheading and a sub-heading. A sub-sub-sub heading is a sub-sub-sub heading not actually a sub-subheading itself.
The reason text doesn’t break down into sub-headings is it’s very much a “headline” to a text, not a sub-heading. A headline is a heading, and a sub-heading is a sub-heading. In the same way a sub-heading is a sub-heading, a sub-sub-heading is a sub-sub-sub heading.
If a text has several sub-headings, the sub-sub-sub is actually a sub-heading. A sub-sub-sub heading is a sub-sub-sub heading not actually a sub-sub-heading. A sub-sub-sub heading is a sub-sub-sub heading not actually a sub-sub-sub heading itself.
This is one of the big differences between a sub-heading, which is like a sub-sub-heading, and a sub-sub-sub heading, which is like a sub-sub-sub heading, and a sub-sub-sub heading is a sub-sub heading not actually a sub-sub-sub heading. Sub-sub-subs are sub-sub-subs not actually sub-sub-subs themselves, but they are sub-sub-subs.
You’ll notice that sub-sub-subs are called “sub-sub-subs” for a reason. They can be written in a variety of ways, but they always have one thing in common, which is that their subject is “sub-sub-sub”.
Now let’s talk about the subject of sub-sub-subs. That’s the stuff that will make a sub-sub-subheadline into a sub-sub-subheading. So it means a sub-sub-subheading is a sub-sub-subheading not actually a sub-sub-subheading. Sub-sub-subs are sub-sub-subs not actually sub-sub-subs themselves, but they are sub-sub-subs.