Content Container - full width by default on posts?

Hi guys,

New website and working on trying to get the padding removed on post so it's full width.

Container Blocks are full width, with inner container restricted to 800px.

For each post, the default Content Container is 'default' - however, for Posts and Page is there a way to set this to Full Width by default?

Also would be good to know where / how to change the 'Default' value and whether when creating new pages and posts, it can be set global to full width or contained i.e. incase in the future we want to change all the Post pages from Full Width to Container (i.e. boxed/padding)

Sorry for the somewhat basic question!