Clear language involves thinking, planning, writing, designing, testing and revising
If your lines extend beyond the sides of the window of this screen, they are too long. Use columns or change your margins to 1.2 inches or larger.
Check the right margin of your text to make sure the lines end at different points. This "ragged right" justification helps readers follow the text. Avoid a straight line on the right or "full justification". This is harder to read because it creates hyphenation and uneven spaces between words.
Use larger letters or fonts, bolding and boxes to highlight headings or important text. Avoid using too many highlighting methods at once.