Still can't screenshot on chromebook - what am i missing?

if you're on an external keyboard there's no show windows key - ctrl+f5 does the same job there. in tablet mode it's power plus volume down.

ctrl plus the show windows key grabs the whole screen. add shift to that and you get the crosshair for dragging a box. they land in Downloads, and also in the Tote at the bottom right for a few hours.