Can the reader tell easily where sections and paragraphs begin? Are words and illustrations positioned appropriately? Have you checked the headings? Are the headings informative? Un ambiguous?...

Can the reader tell easily where sections and paragraphs begin?

Are words and illustrations positioned appropriately?

Have you checked the headings?

Are the headings informative?

Un ambiguous? Consistent? Parallel? Will readers get an overall picture of the document by reading the headings?

Is the hierarchy of the headings obvious?

Can readers tell at a glance what is heading and what is text?

If readers want to find a particular section quickly, will the size and placement of the heading help them?