How do I change the listing font size of the whole document?
I am quite sure that it must be specified in
Document->Settings->Listings but I do not know the input parameter for setting the font at “smallest” size.
Thanks for your attention Simone
Under Document > Settings... > Listings you have to set a value for the
basicstyle "listing parameter". Try, for example, to enter
This will set it in TypeWriter font and size
\small. You can change
\small to whatever you like, taking from (say) What point (pt) font size are
\Large etc.? You could also manually adjust the font size permitted that you have a scalable font selection.