Go to Theme Options -> Page to manage the default settings for page layout and sidebar.
The similar way as for single posts, you can edit these options for each particular page separately.
Watch a demonstration in this short video:
Blank page template
There is a special page template provided in this theme which may be useful in some cases. For example, if you are using a particular page builder to create special landing pages with custom elements only.
As shown on the image below, you can select Blank template which will only display your content, without the page title, website header and footer.
Watch a demonstration in this short video: