How do I wake the display from sleep mode?

My display is connected to my 2016 MacBook Pro. When I leave my workplace and then return, there's no way to turn on the external display. With my old Apple LED Cinema display I just had to hit a button on my (external) keyboard or click the mouse and the display would come on again. The only way to re-activate the LG display is by unplugging the connector. Is that intended? I don't think the connector is going to last very long that way!

LG UltraFine 4K Display

LG UltraFine 4K Display

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