How to use post formats with Modern theme?

How to use post formats with Modern theme?

What is a post format? A post format is used by a theme for presenting posts in a certain format and style, such as “standard”, “image”, “gallery” “audio”, “video”, “quote”, “status”,...
Formats button styles preview

Formats button styles preview

Text styles Dropcap text. Apply this format on a text paragraph. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat voltu. H3 with Heading 1 style Uppercase text. Duis autem vel eum...