The thread will help you when installing the guide profile. In addition to the perimeter of the ceiling, it will also be necessary to mark up the profile that will be located inside the structure. It will be on suspensions in the inner part of the ceiling, connecting to the guide. The distance between the ceiling profile should be 50-60 centimeters, and the attachment points of the suspensions on one rail are 65 centimeters apart. All this should be noted when marking.
In addition, indicate the dimensions of the rails that are located in a certain area, so that later you do not measure this distance, but calmly and quickly cut off the profile rail. Also, indicate the distances between the various parts of the structure, which will allow you to know all the details of the placement, which means that the work will go much faster and more efficiently.
ceiling is completed, now you can place a chandelier on it, make decorative trim, and apply paint.