To view hidden replies on Twitter, click on a tweet that has hidden replies. Look for the hidden reply icon (a partly covered speech bubble) or a "Hidden replies" label. Click on it to reveal the replies that were initially hidden. Twitter introduced this feature to allow users more control over the conversations they engage in. Note that some replies may be hidden due to potentially harmful or offensive content. Keep in mind that the availability of this feature and its interface might change, so it's advisable to check the latest Twitter guidelines for the most up-to-date information.