click on the cogwheel in the right upper corner and select "setup".
Now select the tab "Colours and Logo".
Here you can:
- upload your logo
- change the primary colours of the platform
- add an image of your choice to the login page
- Upload a logo with a transparent background and min hight of 64px
- Use a background colour that works with white text.
- Click here to learn more about how to customise your login page