Display two adjacent pages on a monitor screen (Win 7)

I often work on 2 screens of data or applications displayed side by side on my monitor.  For example when I want to follow a set of instructions to modify a faulty application using Windows 7 – better with a wide monitor screen but not essential. 

In the applications you want to appear on one half of the screen

press the Windows (Start) key + Left key or + Right key depending on whether you want the window on the left or right of the screen.

Then you can work with two windows side by side on the computer.

Alternatively if you have two applications on your monitor screen drag one to the left hand side and the other to the right hand side your screen.  Each will then appear on each half side of the screen.