Use-case: I have created long-text document with a lot of notes/details and I need to move these „detail“ to the nested document so my main document looks clearer for first read, and user who wants more detail should look into the nested document.
Now: I have to create nested document and remove text from parent document and past it into nested one.
Request: I select part of document, classic toolbar appears and I click on „create nested document form selected“ button and voila! 