How to choose another main camera for selfie?

I noticed that when I hold the camera down button and take a picture, the default picture shows the opposite side. Now I have to hold the camera button away from me to take a selfie.
Please tell me how to change the main camera in Ricoh Theta V? So that it was convenient for a selfie.
I would like to hold the camera button on itself and that the picture by default show that party from which side there is a button of descent. Is there a way to change the main camera?