It’s pretty simple to get going. Drag out your first thing you want on your second screen (for instance, the clip bins) using the tab with the window title, and adjust it to the size of your second screen. As you drag out a second window, if you hover it over the new window on your second screen, you’ll see a green bar as you move towards the left/right/top/bottom of the window, and if you let go it’ll snap the new window to half of the main window. Hopefully that helps you out a bit.