Is there a simple way to create a new wrapper in version 4 of CS-Cart ?
Depends what is meant by simple. I think copying and editing to create a new wrapper from an existing one is pretty simple but if someone wasn't familiar with editing files they may not.
In fact, I used the CSS option for each block and then modify the wrappers prop in CSS.
So I did not have to create new wrappers directly.
Thanks for answer !