To create a companion in a reservation that has not checked in, you must go to a reservation that has already been created:
Front Office → Reservations → Room Reservations, Search for the reservation to which you will add the guest.
Once inside the reservation, three modules appear on the screen. Observe in the section Requested Rooms, at the end of it we find an icon called Room placing the cursor and clicking the image.
Once you enter the Room List section you will have to register the reservation holder again and enter the name of the companion in:
Guest→ Guest Information (Same search/register/update guest screen that appears in the reservation module).
Selected guest will appear at the side of the screen in the Front Office Guest Management module.
Return to the reservation screen (from Back) Update and Exit reservation.
The registration can be verified in the Registration Card printout.