There is an option to increase or decrease the default width of the container. Also, there are layouts for the pages, blog page, and single post.
Go to Appearance >> Customize >> General Settings >> Container Settings
There are two layouts for the page, blog, and single post:
- Full Width/ Container Fluid
- Full Width/ Stretched
You can select any of them for your pages, blogs, and single posts separately
Container Width
Page Layout
Blog Layout
Single Post Layout
Click Here to go on General settings