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First, let's be clear on terms. Proofreading is going through a manuscript looking for mechanical errors: missing punctuation, misspelled words, grammatical errors, etc. If you are rewriting sectio...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/30306 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
First, let's be clear on terms. Proofreading is going through a manuscript looking for mechanical errors: missing punctuation, misspelled words, grammatical errors, etc. If you are rewriting sections, that is editing, not proofreading. Proofreading is generally the last step in the preparation of a manuscript. There is not a lot of point in proofreading early because you may be wasting effort on proofing material that is going to be edited out, and any editing that you do later could introduce new mechanical errors that you would then have to proofread for. Of course, you should fix any mechanical errors you see while you are editing. As to whether you should edit your work before you have a complete draft, styles and opinions differ on that, and you should be able to find several questions here that already deal with different aspects of that question.