Anne, I've never used a pinking blade but when I use my pinking shears I aim right down the middle of the line I've drawn. Not sure how I'd do that with a blade but Carrie's suggestion sounds right.
I have one of the first Kindles that came out. Very basic but I hope it lasts; I love having the keyboard instead of a pull down. When this one goes, I'll probably go with the Fire and adjust. I just use mine to read free books, pics show up small and in black & white so I don't download quilt mags/books. Do I sound like June Cleaver? Still living in a black & white world LOL but I don't wear pearls.