"used to set the size, orientation or reflection of the outputs for a screen"
#+end_quote
Running it will allow the users to visualize the state of the outputs
#+begin_example sh
xrandr
#+end_example
Let's suppose that you have a computer and you put a second screen by HDMI port.
Running ~xrandr~ with the following arguments will put the output (let's call it "HDMI") to the left of the main screen of the computer ("LVDS1") and will put an automatic resolution to the new screen: