Can't get two monitors to work properly

[Erwin]

I've been using an external monitor with my laptop through a docking station
for a couple of years. I recently bought a new monitor and it is connected
but I seemed to have clicked on the wrong button while trying to balance the
"Display Settings" between the two monitors.

Only one monitor now shows desktop icons, the start bar and any programs.
The other monitor only has a blank desktop background. They were both
working fine until I started my "tweaks". I can toggle between the two
monitors using my graphics card options but only the monitor designated as
#1 shows the proper desktop and programs.

TIA for any help.

 

[Erwin]

I figured it out (well, more like stumbled into it).

 

[Ace]

Please share your solution for the others that may come.