Used to use a kneeboard when i started flying helicopters - back when wiping the sweat off my nose was a major challenge. Went through the usual student pilot fads, such as folding the chart as tight as possible so that departure and destination are opposite corners etc... then I got my first commercial job - the kneeboard lasted less than a week.
If I need to look at the chart - i'm ashamed to say I steer with my knees, remove chart from pocket, fold it out and read it like pages of a book.