With the most current update, you can only screenshot documents from the main screen, not from a secondary or tertiary screen. Previously I could select the screenshot button and the screenshot cursor would allow me to select information on any screen. Now it is limited to the screen on which the document center is open - inconvenient and slows me down. Please make the screenshot cursor capable of capturing information from multiple screens.
if you do the windows key + shift+s you can do a capture of all just drag the mouse over everything you want. See if that helps you ;)