All of the text information in your articles that is not part of an image can be styled using standard CSS. By using CSS all of your articles will have a consistent look and you won't have to manage fonts for different users.
For all of your image annotations as well as text annotations you should use annotation presets. Annotation presets will make sure that everyone on your account is using the same color scheme and annotation design.
You can create PDF templates that will be used whenever a PDF is created for manuals or articles.