How to download docx file by using DocxElixir library and save formatting?

I have included {:docxelixir, "~> 1.0.0"} to my mix.exs file and then used this library in order to modify uploaded .docx file and download without damages. It had to modify the content of file. It works correctly, except formatting. There is no indents and page forwarding, which is really bad, if we are working with poems and etc.