Hi, I'm using a Lightroom 5.6 on my iMac (early 2009) and a 24" Dell Ultra sharp as an attached external monitor. The Dell is calibrated for my printer so I use this with Lightroom and my iMac for other apps. When previewing a selection of photos and I want to use the Lights Out mode, the Lights Out mode only operates the iMac screen and not the Dell monitor attached. Is there a work around this issue or have I not set something up correctly. Any help gratefully received.
I dim my 2ndary monitor using a tiny (Windows-only) utility app - perhaps there is something similar for Mac. The only other option I can think of is to turn the monitor off (not ideal I know..).