Whenever you add transportations to your trip, the map will automatically update with directions, calculating the route for the newly added transport.
Not satisfied with the directions?
Try one of the following options:
Change the transportation type to "custom": This will display a straight line on the map from your departure point to your destination.
Disable directions on the map for your trip:
1. Go to Trips and select the trip you want to adjust.
2. Navigate to the "Share" step for that trip.
3. In the Trip Settings section, under 'Show Directions,' choose whether you want to display directions on the map.
4. Save your trip.