Can I navigate the split view using the Sidebar or the Find tool?
Yes, in Table of Contents (TOC) or Thumbnail view, hold down the Option key to navigate pages or Table of Contents entries in the split view.
To find specific terms or phrases from the Find window, hold down the Option key while scrolling or clicking through the list of found terms or phrases. Results will highlight in the split view.
Also see: “Why can’t I edit in the split view?”