google analytics – How to create a custom landing page dimension that displays the title of the page, not the link?

I want to create a custom dimension called Landing Page Title. In short it’s the same with the built-in Landing Page except that it displays the title of the page instead of the url.

How to create that dimension? The article Create and edit custom dimensions and metrics – Analytics Help doesn’t help much, because I don’t know how to copy the built-in dimension. Yes, one can go to Behavior → Site Content → Landing Pages and add a secondary dimension of Page Title. However, there is no secondary dimension in the mobile app.