Testing spellcheck in the latest version of Windows Notepad. In March, Microsoft started testing an update to the venerable Notepad app that added spellcheck and autocorrect to the app's limited but slowly growing set of capabilities. The update that adds these features to Notepad is now rolling out to all Windows 11 users via the Microsoft Store, as reported by The Verge. The spellcheck feature underlines words in red when they're misspelled, and users can either left-click the words to see a list of suggestions or right-click words and see suggestions under a separate "spelling" menu item.