To access the embedded form editor, first go to Forms and then click on the Embedded forms tab. Then, create a new form or use an existing embedded form.
In the next screen, you’ll see the editor for the subscribe form. Here you can freely edit the background, text and element colors, fonts, alignment, borders and radius.
In the tab next to it, you can design the Success message page (or skip this and link directly to a custom URL). Under Settings, you can add confirmation checkboxes and interest groups, make your form GDPR-compliant, hide segmentation fields and insert a custom URL. For each of these settings, you can go back to the design tab and style the content as desired.
To learn more, check out this Help article: