1. Under Settings and General settings, scroll down to Popup customization preview

2. Select Content customization

3. Here, you can customize the content (such as Title, Subtext, Fields, Additional features, etc.) that is displayed on the popup

4. Now select Display Settings

5. Here, you can customize the Background, Text, and the button’s Color; there is also a section provided for you to add Custom CSS, should you feel the need to tweak the popup additionally

6. Once the changes are made, click on the Save button to save your configured settings