You can apply character and paragraph options to type on a path. However, paragraph rules and paragraph spacing options have no effect on type on a path. The alignment setting in the Paragraph panel controls the alignment of type on a path.
To add an insertion point, click between any two characters in the type on a path.
To select characters, drag through the type on a path.
If the path text is threaded, type moves to the next threaded text frame or type-on-a-path object. If the path text isn’t threaded, text is deleted. The path remains, but loses any type-on-a-path attributes—all brackets, in and out ports, and threading properties are removed.