Button backs include wire loop, nail back, tape back and prong back.
Canvas backs are particularly suited for decorative use on curtains or pelmets.
Plastic hooks and contra backs can be used for boats.
Buttoning twine is available by the metre.
Specific areas or images in the fabric, such as fleur-de-lis, can be centred within the button top.
Buttons covered in a striped fabric can have the backs aligned for ease of sewing to the finished project.