Avoid condensing or stretching lines or single words to fit your line length. An unjustified right hand margin helps the reader. A word or two in capitals may be fine, but they should be avoided in continuous text. Numbers Choose a typeface with clear numerals. Paper A matt surface is recommended.
Glossy paper can be difficult to read for people with sight problems as it reflects too much light.
Likewise it is best to choose a paper that doesn't allow text or illustrations to show through from the reverse side. Page Design Readers with sight problems can often see only one part of the page at a time. Layout should be simple and clear. Ideally for information books the reader should be able to glean the meaning and impact by navigating from top to bottom left to right. Clearly differentiated headings, and rules to separate unrelated sections make the page easier to follow.