Route description info

Hi
Does anybody know how I can add the route description info for my route. I already have the route started but now want to add the info so when I click on my route in RailSimulator the info shows in the right hnd screen..
Does anybody know how I can add the route description info for my route. I already have the route started but now want to add the info so when I click on my route in RailSimulator the info shows in the right hnd screen..