A Boolean value that indicates whether this text view uses the inspector bar.
The inspector bar displays text formatting controls, much like those in iWork applications, which can be used in place of the formatting controls in the ruler accessory view.
Using Text Formatting Controls
A Boolean value that controls whether the text views sharing the receiver’s layout manager use a ruler.
A Boolean value that controls whether the scroll view enclosing text views sharing the receiver’s layout manager displays the ruler.