"How do I customize buttons on my site?"
Click Edit Theme > Button Style. Here are your options for changing the style of any buttons that appear on your site. You can choose between a "flat" look or a softer, curved look.
Your button color is the “secondary” color in your applied color set.
It is important to add a hyperlink to your buttons, otherwise visitors won't be able to click them. Click the hyperlink icon in the formatting toolbar and add your link. You can link to internal pages (other pages on your website), external websites, email addresses, phone numbers (for mobile visitors) or select PayPal Donation to create a PayPal button.
You can also apply additional formatting to your button, as with any block text.
If you choose to create a PayPal button, you have the option of setting a default donation amount. This is the amount that will appear on the PayPal checkout page when a visitor clicks the published button.
Click Save Changes.
Go to Settings > Donations to enter your PayPal account information. If this information is not entered, donations cannot be submitted.
Provide your PayPal Merchant ID or Email address and your currency. You have the option of entering an organization name.
This is how your donate button will appear on your site: