Using minimal, semantic HTML has many benefits, beyond just bulletproofing your pages for access without CSS. Search engines will often reward clean markup, and it also helps accessibility tools ...

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 ...

CSS: Enter CSS to be applied to the HTML used in your tests. It is placed between <style> elements in the header portion of the page. HTML: This area allows you to enter HTML to be used in your tests.