I switched my dual monitor orientation to a primary 27" (iMac) running 2560x1440, with my secondary 24" running 1200x1920 in portrait orientation. It is, at fir

I switched my dual monitor orientation to a primary 27" (iMac) running 2560x1440, with my secondary 24" running 1200x1920 in portrait orientation. It is, at first, disorientating to have the two monitors eschew but once you get used to it, the reduction in straight from looking far left or right out weighs the strange look. The added benefit is that you get 1920 pixels of vertical resolution for those times that you want to display long blocks of text without scrolling. Admittedly, I use that far less than I use it tiled with windows arranged over-under.