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 5.0.5.2)?
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.
To give an example, I would like to change the style of "A", "B", "C" and so on in this image