I´m asking this question on behalf of a friend of mine who (like me) uses Lubuntu 20.04.
She´s very interested to learn if there´s a way to make the display greyscale, i.e. black-and-white.
She says she´s easily overwhelmed by the abundance of colors presented on various sites and thus often distracted. So switching to greyscale would come in handy to her.
Of course she still needs the possibility to toggle back to color - varying from case to case.
Could this be achieved in any way?
Thanks so much for your help in advance.