The default look of File Explorer is quite bland ... To enable the preview pane, open the "View" menu, and click the "Preview Pane" option. Now, when you select a file, you'll see a preview ...

open File Explorer, click on the View tab in Ribbon and then click on Options, and then and then Change folder and search options, to open Folder Options. You can also Unpin the pinned items like ...

By default, whenever we open a folder from the desktop, instead of opening it in an existing File Explorer window, it opens in a new or separate window or in its own window (based on the option ...