Social Media Facebook How to Chat in Full Screen Mode on Facebook See more of the conversation with this trick by Brandon De Hoyos Writer Brandon de Hoyos is former freelance contributor to Lifewire and a self-described IM veteran who covers the latest in messaging trends and videography. our editorial process LinkedIn Brandon De Hoyos Updated on December 02, 2020 Facebook Facebook Flipboard Pinterest Twitter Snapchat Instagram YouTube Online Dating Tweet Share Email Messages you write on Facebook appear in a small window on the bottom of the screen. If you want to chat in full-screen mode, you have to switch over to the Facebook Messenger website. Instructions in this article apply to all web browsers. How to Use Facebook Chat in Full-Screen Mode If you're already on Facebook, the easiest way to open a full-screen chat window is to do it from the smaller chat window. Select the Messages icon in the upper-right corner and choose the message you want to make larger. Select the gear in the upper-right corner of the message box. Select Open in Messenger. You won't see this icon if you're starting a new message with someone. You can make it show up by writing something to the other person. The bigger chat screen on Facebook lets you do all the same things you can do on the smaller one, plus more. You can search your Facebook conversations, change the “like” Emoji, disable chat notifications, and more. How to Access Your Facebook Chats on Messenger.com You can also view your Facebook messages in full-screen mode by going directly to Messenger.com. Log in to your Facebook account if prompted, then select a message in the left pane to view it in the larger window.