Money flow indicator has no display controls for -0 trend shift boxes.

I work with a black background due to vision issues. The -0 trend shift box is the only part of the Money Flow indicator that has no display controls and it shows way too bright for my cataracts. Please add the control so I can see the candles and other lines that pass through this box. There are a lot of older and retired MTI students that may have this same issue. I use this indicator every day. Please help.