Ctrl+F on a PC orCMD+F on a Mac.from:@"phone-number". For example: from:@"(415) 943-6084"from:@ followed by the display name for a coworker will limit your search to any user. For example, from:@Justin Pot will limit your search to only messages by me (so only the good ones).from:me will show you only things you wrote.in: followed by a channel name will limit your search to a specific channel. For example, in:#general will limit the search to #general.in:@ followed by a display name for a user will show you only things in direct message conversations between you and that person.to:me will show only messages directed at you.before:, after:, during:, and on: all allow you to limit posts to a particular timeframe. For example, before:July will only show posts before the most recent July.has:pin shows only pinned messages.*) after a partial word to see all words that include that part. For example, searching for “car*” would show all instances of car, cars, and anything else that includes the letters “car”-) in front of a word to exclude all results that include it. This is useful for filtering out posts you know aren’t relevant.