Occasionally when i'm driving with the laptop on the passenger seat and pull over to do ...say a quick change between a flag/tables/scalars and i'm looking over at the laptop to find the VE table for a quick glance,if it was highlighted in a selected permanent colour,going back to your most common line would be a nice touch i think.
Just something i usually pick up when driving even when moving that i could run my finger over the pad and select the line by a quick look of the colour.
The old eyes aren't getting better with age

cheers...mario