On the Simple donation page designer, there is a tab to customize a donation button to add to your website. Most websites now have the ability to add buttons, but if you would like to create a button to link directly to the donation page, you can use the Style Donation Button tab.
On this tab you can change the Button Text, Font, Font Size, Font Style, and Button Shape. As well as change the corner radius on a rounded rectangle, Button Color, Text Color, and Border Color. Once you have made your selections, click on Generate Button to create the html code. Click Save & Next to go to the next step.
The html code can be found at the bottom of the Preview & Publish tab.