How is Libre at editing and saving preexisting files such as word and excel files.
Thanks
Hi
It should perhaps clarify your question, but the answer is that you have choice: you can open, edit, save in their original format, or, what is recommended, you can save them in native format LibreOffice.
This is recommended because it avoids format conversions that are (mostly) potential sources of rendering differences.
Note: With File
▸Wizards
▸Document Converter
you can convert “batch” of sets of document.
Regards