The problem is rather easy to explain: how to change the font size/color/boldness of the row/column numbering in a LibreOffice Calc document on Ubuntu 15.10 (LO version is the default 22.214.171.124)?
Is it possible to do it at all? How?
I need to print screen LO and use it in a PDF file for educational purposes (to teach other how to use it).
The default style, when printed and then fotocopied results in a very light shade, almost not readable.