This is one of three options to search for the best path between two or more locations. Look here to see alternative ways of achieving the same results.
You may use this option when you want to calculate the best path that starts on a Place or on a Vehicle's current position.
First, click on the Place or Vehicle to open its infobox. Then, choose the Drive from here action, from the Hamburger menu at the top.
Proceed in a similar manner for all other points you want the vehicle to visit.
Once you are done with the insertion of locations, select the Calculate button.
Frotcom will display the best path that goes from your start point and ends in your stop point, going through the way-points.