You can control website pre-loader, sidebar width and section paddings in Customize>Design Customize section.
Customize > Design customize > Preloader
Essentially, the preloader is what you see on the screen while the rest of the page’s content is still loading.
In this option, you can choose between wide and narrow sidebar on your pages.
This option allows you to change paddings between blocks in 4 variations:
Let’s review this options: