Simply there are two ways to create and save layouts / settings.
The first one is global which affects all your website including pages and posts. They can be set up in theme options.
The other way is using individual settings which can be found at the bottom of each page or post. They are unique to each page, thus can not be saved for other pages.
Global changes should be performed in Theme Options.
Individual (Unique) settings can be changed in Page Options.
How to find Page Options?
Kindly open your page or post and scroll to the bottom of your page.
How to find Theme Options?
Theme options can be found under Rella menu.