“Using the WordPress editor only appears Html code”
Just go to profile and uncheck option disable visual editor when writing like so https://imgur.com/a/9qjD5
“and using Elementor it is not possible to modify the content ”
Elementor is WordPress Page builder and you can use for page/post editing only, if you wish to design a page/post by using elementor, make sure the page template assign to W7 Custom Page like this https://imgur.com/a/CWSJM
