at first, I would like to thank You for a great work. OpenTTD is masterpiece

at second, I really searched if my suggestion is not suggested already (or even implemented


and now finaly to my suggegstion : Is it possible to highlight various tracks with various colours when some key is pressed (e.g. normal track with RED colour, electrified with GREEN etc.)
Reason for this suggegstion : when someone is updating tracks via Convert Rail feature, it is sometimes hard to update track properly (and everyone knows what is the behaviour of electric train on non-electrified track:) ).
So is this possible to include into game and worth of it at first place?
Thanks,
Br, Kreny