What types of problems should be looked for during the proofreading process?

Proofreading is the quality inspection stage for your documents,your last chance to make sure that your document is ready to carry your message-and your reputation-to the intended audience.Look for two types of problems: (1)undetected mistakes from the writing,design,and layout stages and (2)mistakes that crept in during production.Resist the temptation to treat proofreading as a casual scan up and down the page or screen.Instead,approach it as a methodical procedure in which you look for specific problems that may occur.