There are two methods for accomplishing this.

Method 1:

Once your multiple windows are open, please do the following. Right-click in a blank section of the bottom tool bar and select either Cascade windows, Show windows stacked, or Show windows side by side. To undo, simply right-click in a blank section of the bottom tool bar and select Undo on your original selection.


Method 2:

You can also "snap" windows into place using keyboard shortcuts.

For side by side viewing, with your first window selected, press and hold the Windows key and press the left or right arrow key at the same time and then release both keys. Select your next window and follow the same steps using the opposite arrow key. Close out the windows when you are done.

For stacked viewing, with your first window selected, press and hold the Windows key and press the up or down arrow key at the same time and then release both keys. Select your next window and follow the same steps using the opposite arrow key. Close out the windows when you are done.