In order to create an icon that tells linux to use one or two monitors I did the following:
In the System Settings I adjusted the configuration that I wanted for one monitor. Then in the console I wrote:
$ autorandr --save solo-pantalla-lg
then I created an icon with the command:
$ autorandr --load solo-pantalla-lg
Repeat in order to activate both monitors:
$ autorandr --save doble-pantalla
$ autorandr --load doble-pantalla
