Currently, I have two .pial files from Freesurfer (one file represents the left hemisphere and another represents the right hemisphere). I've been using one .pial file to load the Surface file. Accordingly, I can only see one half of the brain. I would like to see a whole brain within BrainNet Viewer.

Is there a way to combine these two .pial files together or perhaps convert these .pial files to another file that contains the whole brain? Thanks in advance!