Heading
From your Shopify admin, go to Online Store -> Themes.
Find the theme that you want to edit, and then click Customize.
Choose Others from the dropdown window -> Choose Password.
From the side menu, select Main password page. Click + Add block and select "Heading" block, or click the Search bar to enter a search term.
Setting
Description
Heading
Add text to display as a block heading (Leave the field blank to hide the heading)