How I mark a part for reassembly.

Sometimes you have to mark a part to make putting a clock back together easier . I've seen X' s and the word "out" scratched into parts . In this case I put a tiny dot in between the two top holes . I know the dot faces out and it also is the up direction when it gets put back in place . A nicer way to treat the movement without putting scratched in words or symbols like the X' s.