"Notebook Monitor Off" - How to turn it back ON???

[zhacarys]

I accidentally selected the "Notebook Monitor Off". So my main monitor is off when the DisplyLink (DL) is inserted. How do I turn my monitor back on? With the DL is plugged in, the monitor is off...so I can't select the menu.

When I unplug the DL, I can then see my main display again, but the taskbar option/app does not appear so that I can turn it back on.

Thanks,
Zack