404
The 404 view displays when a requested page or post cannot be found.
Default Settings
The 404 template in the kernl(wp) theme includes a built-in search field to allow the visitor to enter keywords to find what they're looking for.
Live View
Customize the message
The 404 display is prepopulated with messaging with you can easily customize. Click ‘Customize’ to open tabbed options. Click on 404 page to write a customized message which you can style with headings dropdown.