I am using MSv12 and have just installed a second monitor. My original monitor was only 1600x900 resolution so I now have that as my extended monitor. My primary monitor is full 1920/1080 ( and larger). I have thought about docking the moveable windows on the extended monitor to give more space for the timeline on my Primary but then noticed the option to "send" the preview to the second monitor which automatically sets it at full screen. I wondered what set ups others were using whilst editing and how they organised their layouts so let me know what you find best please.