The June WordPress theme is optimized to support the features of the Gutenberg editor. These features include content blocks and custom styling of colors and font sizes. It’s also designed to make sure that the back end of your posts and pages match the live version on your site.
Just a note: to use the new wide and full width image sections, you’ll have to change your page layout to Full Width, which will remove the sidebar.
Full Width Image

Wide Width Image
Images, videos, galleries, and other content can also be presented in a wide block that extends beyond the central column at bigger screen widths:

Standard Width Image

Image with Cover
Your cover text goes here
Full Width Gallery
Your posts and pages can contain galleries, which are collections of images presented in one or more columns.
Standard Width Gallery
Video Support
This theme also includes styling for wide and full-width videos, such as this one embedded from YouTube.
Quotes
You can pull parts of your content into quotes, such as this one:
You’re never too old to set another goal or to dream a new dream.
C.S. Lewis
Buttons
Insert buttons as calls to action:
Headings
Style headings from level one to six:
Heading 1
Heading 2
Heading 3
Heading 4
Heading 5
Heading 6
Text Sizes
You also have a range of font sizes to choose from for regular text:
Small font size.
Regular font size.
Large font size.
Larger font size.