You can format text to flow along the edge of an open or closed path of any shape. Apply options and effects to type on a path: Slide it along the path, flip it over to the other side of the path, or use the shape of the path to distort the characters. Type on a path has an in port and an out port just like other text frames, so you can thread text to and from it.
You can include only one line of type on a path, so any type that won’t fit on the path will be overset (hidden), unless you’ve threaded it to another path or text frame. You can add inline or above line anchored objects to type on a path. You can’t create type on a path using compound paths, such as those that result from using the Create Outlines command.