About the Nav tree sidebar toolbar

In addition to the standard sidebar title bar the Nav tree sidebar has a toolbar, located just below the title bar.
Image Recorder Tree button — opens a new Recorder Tree window to make changes in the tree nodes.
Image Sync tree button — synchronizes the tree node display with the currently selected view.
Image Close tree button — closes the currently displayed sidebar.
Image Drop-down tree selector — when multiple Nav sidebars are open, this selector allows you to choose which one to display.