In this combo box you can select the target gene for each search. This combo box contains the list with all the genes in the active canvas.
If this field is empty, the target gene can be any gene in the canvas and the search results will include all pathways beginning in the Search From.
If this field is not empty the search results will include only those pathways that start in the Search From gene and end in the Search To gene.
Use this field, if you want to find a pathway between two genes (gene-to-gene pathways) only. Otherwise, if you want to find a subnetwork around the starting gene leave this field empty.