iBooks Author: inspectors
The Inspector window contains tools for formatting text, objects, widgets, links, and more. These tools are organized into individual inspectors, which you can view by clicking the buttons at the top of the window.
From left to right, the inspector buttons are: Document, Layout, Wrap, Text, Graphic, Metrics, Table, Chart, Link, and Widget.
Open an inspector: Click Inspector in the toolbar, and click the button for the inspector you want to view.