Titles.
Notice the title: instructions are typically given some sort of
action-oriented title, either with -ing phrasing
(gerund) or how to phrasing, as we have here.
Audience.
Notice that the level of technical ability needed by the
audience is indicated in the words "beginning photographer."
introductions to instructions must indicate to readers what
level of technical background they need to understand what
follows.
Overview.
Introductions also need overview of contents to follow. The
in-sentence list works very well for this purpose, "(1) loading
the film . . . " Notice that these three items in the list
correspond to the main headings in the instructions that
follow.
Materials list.
Often in instructions you must list the equipment and supplies the
reader must gather before beginning the procedure. In this example,
there is obviously not much.
Special notices.
in instructions, you must take great care to include special notices,
those notes, warnings, cautions, and danger notices that you commonly
see in instructions, usually accompanied by special formatting. In this
scheme, a warning notice is used to alert readers to the need to find
the right type of film.
Second-level headings.
You're looking at a second-level heading here. Notice that it uses
gerund phrasing (ing phrasing). Take a moment to check out the
other headings in these instructions.
Third-level headings.
You're looking at a third-level heading here. Notice that it is "run into"
the paragraph and that it uses bold and sentence-style caps. Again, it
is parallel in phrasing to other third-levels within the section.
Numbered steps.
In instructions, you present each step that the reader must take in a
separately numbered-list item. Notice the format: a number, a period
and then a space before the text; no parentheses. Notice that the
"run-over" lines align to the text of the item, not the number.
List lead-ins.
Introduce every list you have in a document with a lead-in, which need
not be a full sentence as some of the examples in these instructions show.
Notice that the lead-in is punctuated with a colon.
Imperative writing style.
Notice how the individual steps here use the imperative style of
phrasing (open this, aim that, click this, and so on). This is standard
with instruction-writing. "You" is also commonly used. The idea is to
get the reader's full attention.
That completes the comments for this example.
(Last line.)