Drip Forms are a legacy feature, being replaced by Onsite Campaigns. If your account is created after November 2022, you will have access to Drip's new Onsite product instead.
Add custom fonts to a Drip Form to match the look and feel of your brand. Drip lets you choose any Google Font to use on any popup, exit intent, or side tab form. Custom fonts are available in all form body text, field labels, fields, and buttons.
Go to Campaigns > Brand Styles > Fonts and use the search bar to add your custom font. Click on the pink checkmark to save the font to your account, and you’ll be able to select that font in the Form editor. Check out Brand Styles for more on custom and fallback fonts.