If you have multiple tabs in a Finder window, you can drag them to change their order. Just click a tab and drag it to the location in the tab bar where you want it to live. But it gets better. You can also drag a tab from a Finder window to create a new window. Try it; make a new tab, then drag it away from the window. You’ll see the Finder make a new window with that tab’s item—folder or disk—selected.
What if you want to merge multiple windows, and turn them all into tabs in a single window? Choose Window > Merge All Windows, and the Finder gathers all your windows into one, with tabs.
In El Capitan, you can resize Finder windows by dragging from any side or corner. Just click and drag a window to make it larger or smaller. You can even make your Finder window fill the screen by clicking the green button at the top left of the window. I find this a bit too much, but some people, when working with a lot of files, may find full-screen view useful. To exit full-screen view, move your cursor to the top of your display and click the green button again.
You can minimize a window, sending it to the Dock by clicking the yellow button at the top left, or pressing Command-M. When you do this, you see a thumbnail of the window at the right of the Dock; just click it to bring it back into view. This is useful if you need to access a number of windows, but not all at the same time.
Set the size for your Finder windows
For some reason, Apple has never allowed you to set a preferred window size in the Finder. You may open a new window, resize it, then close it, and find that the next new window you create is a different size. Getting the Finder to remember the size you want is tricky, but Macworld’s Glenn Fleishman offers a solution.
Take some time to learn the many options for working with Finder windows, and you may find that your work with files and folders is a lot more productive.
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