I dont know what I am dooing wrong.
I copy Designs/Rapido/newsletter.cshtml to Designs/Rapido/newsletterIvanTest.cshtml and do not change file in anyway.
Then I change template of newseltter page to use this new file like this:
After that on newsletter page is displayed only header and footer and no content.
If I change layout template back to nesletter.cshtml page renders fine.