pik4dOpen PIX4Dmatic.; Click File on the menu bar.; Click Open...; On the pop-up Open Project, specify the location of the root.p4m file and click Open. (Optional) If images are not displayedPix4D has the best support out there. If there is a problem, Pix4D is on top of it. Many of us in the industry learned how to map with modern photogrammetry using Pix4D support articles and tutorials.