While you have a window open, you can snap it to the edge of the screen using the keyboard. While the mouse cursor is anywhere inside the window, press Alt and [ to snap it to the left or Alt and ] to snap it right.
You can also open these apps quickly by pressing the Alt key and the number your app is in the line. For example, pressing Alt and 2 will open the second app you have pinned to the shelf. This works for up to nine apps, and if you frequently find yourself opening an app, it's an excellent time-saver.
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