* usr/share/byobu/keybindings/f-keys.screen,
  usr/share/byobu/keybindings/f-keys.screen.disable,
  usr/share/byobu/keybindings/f-keys.tmux,
  usr/share/byobu/keybindings/f-keys.tmux.disable,
  usr/share/doc/byobu/help.tmux.txt:
  - change the printscreen hotkey from Shift-F9 to Shift-F7
  - Shift-F7 should be more memorable, in that F7 has long been
    used to enter scrollback mode