I was learning cursive during the “erasable” pen era in the mid eighties. My hand would be slick with blue bic ink.
I never really got into the vertical arm wrestling style that some lefties were tought in the previous generations.
I used to make pretend footprints down the backs of the pages in my notebooks to try and blot it off my hands. And also probably because of undiagnosed ADD.
I was gonna make a joke about rotating the paper 90 rad (thinking it’s a typo), but now I know about gradian (abbrev: grad, grade, gon). 1/100th of a right angle.
Still guessing it was a typo, but also a happy accident.
By the way I’m a leftie, but I can write upside down better than I can at a 90deg angle.