OneNote's 18 pt placement grid runs through the page's margin origin rather than the default
36 pt. On pages like "av: casual night in the trees" (origin 36.75) every drag, move and new
caret landed 0.75 pt off; a 22.5 x 15 pt picture drag now lands where OneNote 2010 puts it.

Assisted-by: claude-opus-5.5