Rich text
From your Shopify admin, go to Online Store -> Themes.
Find the theme that you want to edit, and then click Customize.
Choose Blog posts from the dropdown window -> Choose Default blog post.
From the side menu, select Blog post. Click + Add block and select "Rich text" block, or click the Search bar to enter a search term.
Setting
Description
Text
Add text to display as a custom content (Leave the field blank to hide the custom content)
Block padding
Setting
Description
Top padding
Determines the height of the top inner space of the block. Can be from 0px to 50px, increasing arithmetically of 1px (pixel).
Bottom padding
Determines the height of the top inner space of the block. Can be from 0px to 50px, increasing arithmetically of 1px (pixel).