How to Setup Custom Error 404 Pages with Search Bar Blogger

How to Setup Custom Error 404 Pages with Search Bar Blogger
One good blog navigation requirement is to provide clear goals and choices when visitors are on a page on your blog. Likewise with error page 404.

Error page 404 is the page that visitors will see when trying to open a page that is not on your blog, it could be because the page has been deleted, the link is broken, or the visitor