While you create a new page from the Pages » Add New section, the “Default Template” is attached to the page by default. The default page template is a standard page template that would be with a sidebar or full-width layout and can contain custom content.

Home Page 
This is a specific page template designed for your website front page (homepage).It displays slider / video / image automatically 

No Sidebar
if you don’t wish to display a sidebar on a page, use this page template with it. 

Full Container
if you don’t wish to display a sidebar on a page and using the full width of bootstrap container class, use this page template with it. 

Sidebar / Content
if you would require to display a sidebar on a page left side then content, use this page template with it..

Content / Sidebar
By default, the sidebar displayed on pages right. However, if you would like to display a sidebar on a page content / left side, practice this page template with it..

On post edit screen choose one of predefined Page Template in Page Attributes metabox on the right. The theme support these Page Template

Setting single page hero image

On the page new / edit screen, you will find update single page hero image update options.