In Auto-Hide Mode, the Sidebar windows are always hidden, but you will see icons of the Sidebar components on the left side of the browser.
There is two different types of Auto-Hide mode.
By hovering the mouse over the icons, the corresponding contents will be displayed, and they will hide again by moving the mouse off of the icons.
By clicking the icons, the corresponding contents will be displayed, and they will hide again by clicking the windows. If you don't want the Sidebar windows to be popping-up and hide as your mouse over the icons, but also don't want the Sidebars to show all the time taking up your main window space, this is a right option for you!