Lupton the third

1.) Mind your dashes. Em dashes are for grammatical breaks (dog—cheese or dog – cheese). En dashes are for numbers (11-12). Hyphens are for within words (long-term parking). Discretionary hyphens are for line breaks and should not be hard hyphens (which will remain in the text even if they are no longer needed). I care about these sorts of things, so I think everyone else should too. Lupton is on my side on this.
2.) “Every project should have a true editor, a person with the training and disposition to judge the correctness, accuracy, and consistency of written content...failure to edit carefully is the source of costly and embarrassing errors” (167).
3.) Editing and proofreading are different tasks, even though they can both be performed by an editor. I think this is important to point out, because editing needs to be something more than fixing spelling errors and grammatical mistakes, while proofreading needs to be completely focused on correctness over content. These two forms of correcting writing have to be balances so that the task can be completed successfully.

Has anyone used proofreading marks anymore? Do you think that these marks have become obsolete with the technology available to writers and editors today?