Route to custom file

This is just simple. First create a page and use slug for it as custom. And then rename you php file to page-custom.php and that would be it.

Unable to access new installed theme

This is typically a file ownership problem — in a normal install, WordPress runs as the webserver user (www-data in the default Ubuntu install of apache). When you create files or copy them into your web directory, they’re owned by your normal user account. sudo chown -R www-data your-theme-directory should take care of it.

Style of a theme

Yes, you can do this with Child Themes. A child theme is a WordPress theme that is based on another theme. The child theme points to the parent theme, and inherits styles, functions, and templates from the parent theme. However, in the child theme you can override any style rules and templates that you want … Read more

How to change images size after theme modification?

To change values inside the content can you search/replace in the database, but it is hard to update all values, if the values are different. For a search/replace can you use a plugin or helper. The helper is very good for all ToDos in Search/Replace context. The plugin is useful for search/replace in different tables.