Long lines of text make it hard to track words across the screen. When lines are too long, readers often lose their place or accidentally jump to the wrong line. This is especially challenging for people with dyslexia who may already struggle with text tracking.

The ideal line length for readable text is between 60-70 characters (12-18 words) per line. This length helps readers move smoothly from one line to the next without losing their place. On mobile devices, aim for 30-40 characters per line to maintain readability on smaller screens.

Use margins and padding to control line length in your layouts. Set maximum widths for text containers to prevent lines from stretching too wide on large screens.