How To Configure Your Monitors With Xrandr in Linux -

Just about every desktop environment comes with some way to configure and control your monitors, but some aren’t quite up to par, and bugs can be a factor. Then, there are tiling window managers and more minimal desktops that don’t have those utilities. In any of these cases, Xrandr, the Xorg’s own utility for monitor management is your best friend, and it’s not too hard to use.
This is a companion discussion topic for the original entry at

Great walk through! I just have one question.

Are we suppose to write and copy the block of code with our monitor identifiers that you have at the bottom under “Conclusion”. If so, I haven’t done that yet and my external monitor is still black despite being able to see the cursor.