If you would like to further dig into a specific branch of the tree, you can click on the expand button to re-run the algorithm on this sub-target: "more routes from here".
As a result, you get a customized route with different starting materials obtained from the break down of previous ones.
If you are happy with your selection you can accept it and your tree will grow accordingly.
You can perform this expansion at each level of the tree to build the tree that fits your expectations.