Follow these steps to use the Predefined Template for your About content.
STEP - 1
Click on "About APP".
STEP - 2
Before using template delete all the content of editor and use the template to fill the editor with new one.
Scroll the page and you will see the section "Predefined Template"
To use this template for your default About Page content, Click on "Use" button.
STEP - 3
Now this template fill in editor. With the help of this editor change / edit the text content of About page. Just edit the content with the help of "Editing Tool".
Click on "Update" button to save the content.
STEP - 4
Now see the preview on click on "Website" button.