In word processing, which choice is NOT part of the proofreading settings?

The choice not included in the proofreading settings is the one that pertains to customizing the user interface rather than checking for errors in the text. The Quick Access Toolbar is a customizable menu in word processing software that allows users to quickly access frequently used commands. While it enhances user efficiency by providing shortcuts to tools and functions, it does not directly impact the proofreading capabilities of the program.

In contrast, the other options are all features that assist in identifying errors within the document. Checking spelling as you type ensures that mistakes are highlighted instantly, allowing for immediate corrections. Marking grammar errors as you type similarly offers real-time feedback on grammatical issues, enhancing the quality of the writing as it evolves. Frequently confused words is a specific proofreading feature that helps distinguish commonly mistaken words, guiding the user toward using the correct term in context. Therefore, the Quick Access Toolbar, while useful for navigation and function access, does not contribute to the proofreading process itself.