The Formatting transformer applies your choice of formatting to the Source code. Once a Formatter is enabled, you'll have access to a further set of customizing preferences. You can enable/disable any of these as fits your needs. The state of those toggles will be remembered and maintained if you deactivate and later reactivate that formatting transformer.
Minify makes your code smaller when you send it. You can see the size of your email before and after minifying in the bottom left corner of the editor window.
Special characters (like ©), reserved characters (which would otherwise be interpreted as HTML code), and invisible characters (like non-breaking spaces) can cause hard to track down bugs in email. Instead, we recommend using HTML entities. An HTML entity is a piece of text that begins with an ampersand (&) and ends with a semicolon (;).
The Encode HTML entities transformer will auto encode entities for you. For example, © will become
This transformer prevents the last word of paragraphs from being on a line by themselves.