I couldn’t help but notice the passenger one row up and across the aisle from me on my first leg. Her laptop was on and clearly visible. The brightness on the screen was turned up to what seemed like 10000% against the dim nighttime plane lighting. She had papers strewn about her seat area, too.
In a matter of seconds, and without really trying to, I figured out she was a lawyer. Not only that, I learned what specialty she worked in, what her major upcoming deadlines were, her staffing needs for the next few months, and the fact that she was waiting for a particular federal appellate decision to guide her strategy in her case in the lower court. How did I learn this? Bright screen, high contrast, big font.