The less good part : if you mess around and end up breaking your form, don't come whining ! (Don't worry, you'll 'only' have broken your own form, the worst that can happen is having to start over a new one :)
Describe what your form is about. This will appear above your form.<br/> If you want to display pictures, you should consider using an external image hosting service, like <a href='https://framapic.org' target='_blank'>framapic.org</a>.
Optional image that will be displayed at the top of your form (example : logo or banner).<br/> After having selected it by clicking 'Browse', don't forget to click 'Upload' to make it available online.