Extending Your Displays

Navigate to your desktop and right click on an open area anywhere so that the following menu pops up.

Click on "Display Settings".

The following window will pop up:

Scroll all the way down until you get to the "Multiple Displays" heading:

Click on the drop-down box and select "Extend these displays". Apply changes.

Scroll back up, and click on "Identify". 

Take note of the order in which the numbered boxes appear on your screen. You can drag the monitors in the following box:

Once your screens are in the correct order in which they appear, click "Apply" when it appears.