If you want to mute yourself on Apex Legends, you can do so by accessing the settings menu. To do this, you will need to press the Esc key while in the game. This will bring up the options menu. From here, you can select the "Settings" option. In the settings menu, you will see a "Voice" tab. This is where you can adjust your mic settings. To mute yourself, you will need to click the "Mute" button. This button is located in the top-right corner of the voice tab.