Write clearly and mark neatly. Proof reading fails if your handwriting or your marks will be misread. If anyone has ever complained that your handwriting is hard to read, you must print. Avoid repeating a marginal mark in the text or placing a marginal mark in the text. You should leave it to the corrector to adjust spacing and word division.
Good handwriting is essential.
In this topic, you are learning the book system of proof reading marks. Another standard system is the guideline system . Do not use them.