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Everything you need to know to write effective alt text
When screen readers like Microsoft Narrator, JAWS, and NVDA reach content with alt text, the alt text is read aloud so people can better understand what's on the screen. Well-written, descriptive alt text dramatically reduces ambiguity and improves user experience.
View only unread messages in Outlook - Microsoft Support
When All is selected, every message in the current folder is shown in the message list. When Unread is selected, only the unread messages in the current folder are shown in the message list. In Outlook 2016, select the drop-down at the top of the message list and then select Unread Mail.