create application pages that look like OOB pages

Question

I want to create pages in SharePoint that look exactly like SharePoint pages. To have the same layout as the New Site Collection page, or new web application pages, I saw many solutions made this way, I am wondering how to do the same.

Answer 1

If you mean the Getting started with your site look, then you can't unless you're building a new site collection.

But all of the features (and many, many more) are still available if you hit the gear Icon in the upper right corner and select Site Settings.