The Brainliest Answer!
It's hard for me alone to explain it. Just watch the video of literary in this link 

Don't worry it's legit.

Or I'll just explain it briefly:

Authors use text features to bring attention to important details. You can use the following features to become more successful and efficient in your reading: 

Text Features:

Fiction :
• Title
• Chapter Index (for Chapter Books)
• Illustrations
• Bold Print
• Continuous Text
• Paragraphing
• Dialogue 

Non-fiction :
• Title
• Table of Contents
• Index*
• Photos
• Captions
• Diagrams
• Glossary
• Date line (periodicals)
• Bold Print • Headings
• Sub-titles

*The more readers build up knowledge about these elements and underlying structures, the better they can use them as sources of information. 

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