Hi,
Many thanks to all who replied pointing me to the "extsizes" package.
Using it's 8pt fontsize almost solved my problem (I installed the
"extsizes" from CTAN and then added the "\usepackage[8pt]{extsizes}"
to the document's "Layout -> LaTeX Preamble" - koma-script documents
need nothing more).
Well, why almost ... ?
I get the correct font size, but ... somehow margins are extremely wide.
I use A4 paper and I'd like to have around 1.5cm margins, but I get ...
the left and the right margins are about about 4.5cm, the top margin is
about 5cm, the bottom margin is about 2.5cm.
I tried to change "Layout -> Paper Layout -> Papersize -> A4" and then
"Layout -> Paper Layout -> Margins -> [Top, Bottom, Left, Right] ->10mm",
but there is no visible effect (I still get these "wide" margins").
Could you, please, help me,
Thanks in advance,
Jacek.