You can edit certain parameters of the email using the options found under “Design” (see above). However, you also have the option of designing the template for your emails entirely yourself in HTML (provided you have booked the appropriate subscription plan/feature).
Under Agency > Email Templates you can find all default emails, their HTML code and the different placeholders that can be used for the template (e. g. Event image, main color etc.). Given the necessary knowledge, you can implement your own designs here.
Warning: If you use your own templates, you will no longer receive email template updates from guestoo, as your own code will be used instead of ours.