I maximized the editor and now I can't get it back to normal size

If you double-click the title bar of Friday's editor, it expands to fill your entire screen.
Since there are no control buttons, it's not obvious how to make it shrink back to less than full screen.

If you drag the title bar down and to the left, you can move the mouse pointer over the side and top of the editor to get resize arrows. When you see the resize arrows, click and drag to shrink the editor. Then use the title bar to drag it back to where you want it.

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Friday The Automatic FAQ Maker