Multiple Legs

It would be a nice feature to have the ability to display the previous flights an aircraft has made. For Example: If over the course of a day an aircraft goes from KLAX → KDEN and then KDEN → KBOS you could display the entire days route. Maybe the previous legs would be a different color or colors if over multiple days. This would be more useful for specific N#'s instead of flight numbers. Just a thought, any constructive criticism is welcome.