LW has a Focus Chart, which allows one to log the position of the hot spot, note about edge, placement of shutter cuts, etc..
It's generally a by-product of the instrument schedule, that gets printed and filled in by hand during focus, then logged back to LW for reference later.
Used a lot in Broadway tours by the ASM for focusing at load-in. Generally with a touring rig.
Obviously for static fixtures, though Viveone Leon (Broadway assistant, famous for her paperwork) also uses a method to log all positions of ML's, cue by cue. Did I say she was famous for generating paperwork ?.