For print or pictures they should be as dark as possible on a clean background. A photocopy where the letters are gray and the background is also darker is not ideal for a child who needs good contrast. Pictures need to have good contrast and be simple in format. Cluttered pictures will not be easy for the child to see. Also having many pictures on a page causes the same type of visual clutter.
Color can be an effective visual cue.
It can be used to organize and classify or bring attention to important visual material. Pictures or print should be spaced well. It is helpful if there is a good amount of space between pictures or words as it makes them stand out better. More space between lines can make tracking easier. A student's workspace can also be changed to assist them in using their vision.