The CSS code modifies the PayPal button slightly, centering it on the page without changing its functionality. Open the HTML source code of the Web page that contains your PayPal button in a text ...

Image: Malwarebytes. However, when the user moves his mouse to close the popup, CSS code from that page will expand the popup and move the ad in the cursor's path, so any click on the close button ...

Click the scroll-down arrow in the middle column and select "Add CSS." Enter your custom CSS code in the "Add Custom CSS" box. Click the "Apply to Blog" button located in the right corner of the page.