In a file of centerline data - What is the scope of the "calibrate" directive? If "calibrate" is specified at the top of a file, does its effect end at the end of that file? Can "calibrate" be specified partway through the shots? Is there a way to reset the effect of "calibrate", similar to the way "flags splay off" can be used? I have a file of centerline data where most - but not all - of the length measurements need an offset added. We had tails on the DistoX devices but forgot to change the internal setting to adjust for it. Most shots need 74mm added - but not all! We found one DistoX which was correctly set. Fortunately the shots it was used for are easily identified. There are several other files of centerline data which do not need offsets, and I want to make sure the effect of "calibrate" is limited to those shots where it is needed. Thanks! -- =============== Bill Gee