How to Use Finder Tabs on Your MacBook with El Capitan
El Capitan includes a powerful feature you can use to display multiple locations in the same window on Your MacBook. Finder Tabs work just like the tabs in Safari (as well as other popular browsers for both Macs and PCs), allowing you to switch between multiple locations on your Mac instantly by clicking a tab to switch to that location. You can even drag files and folders from tab to tab!
To open a new tab in a Finder window, you have a wealth of choices:
Click the desired location and press ⌘+T.
Right-click the location and choose Open in New Tab.
Select the location and click the New Tab button (which bears a plus sign) at the right side of the window.
Click the Action icon (which bears a gear icon) in any Finder window toolbar, and choose New Tab.
For example, suppose you’re working on an iMovie project. You might create tabs using the Applications item in the Finder window sidebar and a folder (or even a DVD or shared drive) named Work that contains your video clips. The location appears as a new tab immediately under the toolbar. You can open as many tabs as you like, and you can also drag the Finder Tabs themselves to reorder them. To close a tab, hover the pointer over it and click the X button that appears. Here are three Finder Tabs at work.
You can also set new folders to open in tabs instead of windows. Just click the Finder menu at the top of the Desktop, choose Preferences, and then select the Open Folders in Tabs Instead of New Windows check box to enable it.