To update your avatar, navigate to your user profile by clicking on your name or avatar at the top right of the interface. On your profile, click on the “Edit” button beside the “Personal Account” section, and then click “Upload Avatar.”

This will bring up the file upload dialog; user avatars can be a maximum of 4000x4000 pixels, and must be in .jpeg or .png format. Select a compatible image file to upload and use the file as your avatar.