Lost 3rd display (TV) connectivity multi monitor setup

Footyslayer

Honorable
Jan 30, 2013
63
0
10,630
Hi everyone, got an annoying problem here.

I have been able to use my TV as a 3rd monitor, I basically have it connected via HDMI and i drag certain windows to it to view, aceplayer etc for movies. I did something yesterday by accident and I have lost this function, the 3rd display (TV) just doesn't show in displays (just my normal two monitors).

My TV does show in connected devices, how do I re-add it as a 3rd display how I had it?
I'm tearing my hair out!