Until now, typing on a curve was only possible in graphic programs. While it is possible through complex CSS styling to set individual letters of type on an arc for the purposes of web publishing, it is an incredibly tedious, trigonometric process.
Arc Type uses jQuery scripts to process those calculations, while allowing Muse designers the ability to choose font formatting.
The curve is always a segment of a circle (hence arc) for which the radius can be specified. The space and rotation for each letter will be calculated using that radius and the width of the text.
Curve text clockwise, counter-clockwise, even into a full circle based on the length of the text... automatically.