Have I windows 8.1 on my Dell Computer. I right clicked on the desktop, clicked on 'screen resolution', clicked on 'advanced settings',clicked on tap 'intel@hd graphics, control panel', clicked 'graphic properties', clicked 'display', changed the 'brightness' to 6, changed 'contrast' to 40, changed 'gamma' to 2.5 After I made these changes I could read the info in session rules that had the dark background. To view Trainz or my regular use of my computer I would change it back to the default setting. I also saved as a profile.
Hope this helps