404 page

Hi there,

i would do this:

1. Make the 404 Template full width with a Layout Element in Appearance > Elements:

https://docs.generatepress.com/article/layout-element-overview/

Set the Content containe to Full Width.
Set the Display Rules > Location to: 404 Template

2. Then create a Block Element:

https://docs.generatepress.com/article/block-element-overview/

Set the Element type to: Content Template
Set the Display Rules > Location to: 404 Template

Then in the editor construct your 404 page. I would recommend using GenerateBlocks to construct your page.