I just bought a new ProArt Pa329C 32. Previous to this purchase I had a very old 27inch thunderbolt display that I used with my MacBook Pro mid 2015. I used to close the MBP in a stand out of the way. I am terrible with terminology but I think it's called clam shell. With my new monitor I have to have the MBP open for it to show up on the new display. Is there a setting I can change? I appreciate any help.