The Finder > View menu shows four items of interest to us. Path Bar, Status Bar, Sidebar, Preview. When checked, two of these options are applied to every tab in the frontmost Finder window, one is applied to every tab in every Finder window, and one is applied only to the tab that’s currently viewed. This is inconsistent and not predictable.
Show Path Bar is applied to all tabs in the current window.
Show Status Bar is applied to all tabs in the current window.
Show Preview is applied to all tabs in all Finder windows (background Finder windows suddenly show a preview).
However, Show Sidebar is applied only to the single tab in the current window.
It’s a bit confusing and frustrating to have options that are placed together yet have different global effects.
Finder 10.11.4; OS X El Capitan 10.11.6.