Moderator Sir had added a similar feature called 'Fan spots' a couple of years ago, where RF's can mark important locations on the Atlas ( RF spots, sceneries, importnat landmarks etc) that would show up in the Atlas route and later on in the train time tables ( only in the Atlas I guess, showing this in the timetable can make it very cluttered) like you suggested. Here is the reference blog:
/blog/post/1229597 However, I am unable to find any fan spots through the atlas. I do remember seeing people mark fan spots in their blog posts though.