Explaining the need to avoid horizontal scroll

Question

I need help explaining to my boss why her design is poor on a client\'s website. She has no knowledge of the web, and it can be difficult as a web developer working with a

Answer 1

People read left to right, top to bottom (or right to left in some countries). Because of this they can read a lot more content before they need to start scrolling as they only have to scroll vertically.

If you introduce horizontal scrolling then the user has to potentially scroll at the end of each line rather than at the end of each page.