Large screenshots
In order to create a screenshot of a program with a virtually larger resolution change the resolution with xrandr as follows
# set large screen 2560 is width and 10000 is the height xrandr --output HDMI-1 --rate 60 --mode 2560x1440 --panning 2560x10000 # make screenshot and # set back to normal xrandr --output HDMI-1 --rate 60 --mode 2560x1440 --panning 2560x1440