I write instructions for our assembly lines. Frequently, I need to call their attention to something that is not a step, but that they need to know. My usual way of doing this is to write, "Note: Do thus and so." This will be included with the steps, which are in a numbered list, although the note is indented and not numbered. Is my use of a colon here correct, or would another mark such as an em dash be more appropriate? Also, should the following word be upper- or lower-case? I would like to stagger them vertically, but I am limited on room.

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    Headlines, signs, warnings, instructions and the like do not have to follow the stricter rules that prose virtually demands. Even in prose, using capitals after colons is an old-fashioned rather than an incorrect practice. Here, they add impact. – Edwin Ashworth Sep 25 '17 at 21:32
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    The typical answer to questions like this is: check whether your employer/customer has a style guide that discusses this, and follow that.  If you can’t find a style guide, look at similar documents that your company uses and do whatever they do. – Scott Sep 25 '17 at 21:48
  • That is about what I would do, if the text formatter let me. – Hot Licks Sep 25 '17 at 22:09
  • As the guys said, your suggestion is correct… but more importantly, how likely is that t be the only Question arising from the same situation? What made you doubt Note:… was acceptable, please? – Robbie Goodwin Sep 25 '17 at 22:58
  • Are these instructions in a user guide - a 8.5"x11" 3-ring notebook format, or are they printed placards affixed adjacent to the machinery they reference? – IconDaemon Sep 26 '17 at 0:18

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