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 cannot 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 the Grid menu.
Page Options
Page Options can be found at the bottom of each page/post. You can change the page layout, assign a sidebar or create a custom title bar for your page/post. These options are unique to each page, thus cannot be saved for other pages. All the changes made in page options will override theme options.
Header Page Options
Page menu - Click if you want to select the menu on the page.
Change the menu style for this page? - There you can enable the option, which can allow changing the style of the menu.
Menu style - Here you can select the style of the menu.
Show additional button in the menu? - here you can add the additional button. A menu will have an additional button
Select header style - There you can select the style for the header.
Site logo - There you can select the style of your logo.
Site Logo on a scroll - There you can select the style of your logo on the scroll.
Site Logo on mobile - There you can select the style of your logo on the mobile device.
Footer Page Options
Footer style - There you can select the footer style.
Enable Footer additional info - Here you can enable the option which allows turning on Footer additional info
Enable Footer copyright - Here you can enable the copyright.
Copyright align - Here you can select the align for the copyright.
Enable Footer Socials - Here you can enable the option which allows turning on Footer socials items.
Socials align - Here you can select the align for the social elements.
Other Page Options
Enable dark version for the page - Here you can enable the dark version for this page.