Or, if you want to pin an email and mark it as unread, a Quick step can simplify the task in one click. Note: Quick steps cannot be undone by using a menu command or a keyboard shortcut like Ctrl+Z. This is because Quick steps can contain actions such as Permanently Delete that are not able to be undone. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.