I don't remember being taught how to grip a pen correctly. I'm pretty sure my grip is wrong too, since I developed a callus on my index finger from writing too

I don't remember being taught how to grip a pen correctly. I'm pretty sure my grip is wrong too, since I developed a callus on my index finger from writing too much during school. FWIW I grip like "dynamic tripod grip" on "figure 3", except the thumb is perpendicular to the pen.