It would be really useful to have a cancel button on the mailing templates to exit the mailing template without saving changes and return to your previous screen. At the moment if you create a new template but then decide you don't want to go ahead with it, there is no cancel button which means that the system creates a new template for you even if you haven't saved it. Often times people just create new mailings to look at a feature or test something and we end up with loads of unwanted templates in the system.