Route legs is the leg between e.g. the Airport and the train station. The airport and the train station are called Route Stations, in Bókun.
So to be able to create route legs for your transport product, you have to have created Route Stations first. Route stations is what links the route legs, e.g. Airport and train station, together. Here is a link to an article on how to create Route Stations.
To create Route legs select "Products" on the top bar and "Transport" from the drop down list.
Select the transport product you are working with from the list. If you haven´t created you transport product yet, you have to start by creating the transport product.
The route legs are dependent upon Route Stations. With the legs your are tying together the stations you have created. When you have created the Route Stations, an "Add" button has appeared by the "Route legs". Select "add" to create a new route leg.
In the route legs you select the to and from station and save. As soon as you save the to and from stations you get the option below to add schedule to the route legs.
The schedule are the departure times from the "To and from stations" you just added. When you saved the leg, the option of adding the departure times appears at the bottom of the screen. There you can write in the boxes you schedule. You can add multiple departure times for each leg.