There is a Custom CSS section in your Integrate Chart tool:
Custom CSS allows you to customize the appearance of your submission form, chart and other elements. For that you need to know the specific codes that needs to be saved into ‘CSS code’ field. That requires a development skills. However, our development team is always happy to help with little changes such as hiding parts of the chart, changing color of the buttons, etc.
If you have any questions or specific requests please message us on Live Chat or send an email to email@example.com.