It has always been a problem for me when I do my assignments, because I wished I had a third hand to hold down the book as I type on the computer. I kept thinking there has to be a solution. So I googled for some ideas, got some coated wires what used to be a clothes hanger, a pair of tweezers and started on it.
Voila! Looks very crude but it does the job and I am a happy girl.