At its simplest, proofreading is checking a document for errors. Proper proofreading is more than just a quick check for spelling and grammatical correctness. It’s your final chance to polish your work and make sure it says what you want to say the way you want to say it.
Text looks different on a computer screen. Proofreading from a hard copy, you will find errors you might otherwise miss.
Part of proofreading is a word-by-word check for spelling and grammar. Computer checking programs won’t catch errors like the word “pain” instead of “pane.”
Proofreading requires the use of a dictionary to verify the meanings of words. Always check word use if there is any doubt a word is used correctly.
A good proofreading is not complete without a careful survey of the document to insure it is well organized and the information is presented clearly, completely, and accurately.
Documents should be proofread a couple of days after the draft is written. This helps in spotting errors and identifying superfluous words and phrases that should be deleted.