Congratulations, we are halfway through our 'course' already! How do you feel? Today, we are focusing on the position of your reading material (and subsequently your posture).
Lesson 7:
Tilt your book up about 20 degrees (this slopes up about 4 inches in 12).
By doing this, you can usually work farther away than when you place the book flat on the desk.
I found this picture when I searched for book stands and I think it shows very nicely how your posture changes completely when you work with a sloped book.
As they say - a picture speaks more than a thousand words.... so I keep quiet now and let you decide for yourself if it is worth while investing in a book stand.
PS: Did you notice how she is working at sub-optimal lighting conditions, if yes, then you did really internalize lesson 6, hahaha.