How to add a logo and a favicon to your account
First, click on your user icon in the navigation bar:
Then choose 'Account Settings':
This takes you to the screen where you can upload your account logo and favicon:
You can change the logo of the account by clicking on the "Upload" button and selecting an image. Allowed extensions are .png, .jpg and .gif. The logo of the account will show in the Manager and will be the fallback image for Open Graph data for Newsrooms and articles.
Similarly, you can change the favicon. You'll need an .ico file for this.
Finally, you can also add a default featured image as explained in a separate article.
By default, the account logo will be selected as featured image of an article if there is no featured image selected.