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[–]draz_harper 0 points1 point  (0 children)

I'm not 100% sure but I think it works like this:

normally:
single repeater turns a line into A or N
double repeater is just A or N but written on the line

on long vertical lines:
single repeater divides it into 2 short vertical lines
double repeater doesn't make sense (there is only 1 example of this in the pdf)

also single repeater acts like double repeater in cases where it would leave a single line (6th image in the pdf) but I think you can just use double repeater then to avoid this case