I am using Cytoscape 3.1 to display protein-protein interaction network. I imported the network file "file.txt" and selected the layout to display the network on Cytoscape. Now I want to highlight shortest path (edge and nodes) between two selected nodes (e.g., C to E). Could anyone please tell me the way to highlight the shortest path on Cytoscape.

Example "file.txt"

gene1 interaction gene2
A PPi B
A PPi C
C PPi B
C PPi D
B PPi E
D PPi E

Now I want to know the path between C to E

Results would be:

(1) C-B-E
(2) C-D-E

I am not familiar with cytoscape command line. I would encourage if provide me the detail script according to my "file.txt".

Thank you very much,
Ahmed