If you’re looking to set a nickname on Facebook Messenger, there are a few things you need to know. First, you’ll need to open up Facebook Messenger and go to your profile. Next, click on the three lines in the top left corner of the screen (known as the “Menu Bar”). From here, click on “Settings.” Once inside your Settings page, scroll down until you see “Account Settings.” Underneath “Account Settings,” find “Nicknames.” Click on it and then enter a nickname into the field at the top. Click on “Save Changes” at the bottom of the page. Now that you’ve set your nickname, all you need to do is start using it! If someone sends you a message with their new nickname attached, just reply back with your old one and they’ll be prompted to change it back. ..