I upgraded to Sierra on my Macbook and I hate it! On the previous OS what was it El Capitan I guess and the ones before that I could have work open on my desktop and I could have other desktops available with other work on them easily accessible by using the Hot Corners feature. Now I can not??? What happened to my other desktops? It's like Apple went backwards back to the frustrations of windows in PCs! This change is making life much more difficult. I used to keep reference materials open on other desktops when I am working and I could work in full screen mode on the desktop I was active on. But now I have to use smaller windows in order to see what's behind them and switch back and forth. What a colossal pain in the axx! Is there a way to get the other desktops back?