vertical full heightto edge:
2120×2970 pixels 21.2×29.7 @100
horizontal:
3425×2446 pix
29×20.71 @300

line on 22= half mark between 2 1/3 feom binding and 2 1/3 from end of page….for double pages.
line on 22+ = half between binding mark and end of page for centering.