You have the option of sending any number of scheduled emails with replacement fields on any "X After Days" from the receipt of the original email.
To add an email, enter a Mail Subject and choose whether you wish to use HTML or not.
If you do wish to use HTML, the easiest way is to create an HTML page with your favourite web design program and include links to images on your web site, such as the ones shown here on OfficeJuniors web site. Then you may insert the Fields at the relevant places in your HTML - you can either do that in your template, or in the design window here.
Images are not embedded, but if you wish to use an image for a background you may choose the "Insert Background Image" option.