Banner
  1. Press Customization on the left side menu.
  2. Press Branding on the top menu.
  3. Under the Banner Image heading press Upload.
  4. Select your Banner and press Done.
  5. Finally press Publish to complete the upload.
Avatar
  1. Press Customization on the left side menu.
  2. Press Branding on the top menu.
  3. Under the Picture heading press Upload.
  4. Select your Avatar and press Done.
  5. Finally press Publish to complete the upload.