In my case, do I want Edward The Rogue South
However, when we want to change who is selected, the process is not so simple to figure out in Family Tree.
The developers call this "Preferred Parents And Spouses"
In my case if I want to set Thomas Salinas, who my mother knew as Daddy, who grandmother Nancy was married to in the Logan Temple as the person in the tree you can currently do it in new.familysearch
or you can pick Thomas as an example: by going to the child node, which when you click it brings up the parent link you want to be in the tree. This choice will remain if you do it that way.