Click on the coat of arms symbol and then on "Team profile". Here you will find an 'Edit' button in the top right corner which you can use to change the team name, logo and team photo.
In this view you can easily enter a new name, add a new team logo or upload a team photo. Just note the maximum file size of the photo files and their formatting in .jpg format. The club logo (max. 5MB) will be resized to 200 x 200px and the team photo (max. 10MB) will be resized to 700 x 400px.