Select "Routes" in the menu bar. Then click on the plus symbol "+" in the top right corner to create a new route.
Personalize your route with a header image, route title, and add add a description if you like.
Then you can search for waypoints and add them to your route by clicking the plus symbol "+", as well as adding a new day. To do so, enter the place, accommodation, or sights. After adding all waypoints click save and they will be displayed in your created route.