Is it possible to change the display font in Studio 2015 Editor?

I cannot find the answer to Lorenzo's 2nd question in May.

 I tried the "Font adaptation" option, choosing a different font for French, but it seems to only apply to the TM window. However, I would like to change the font in the editor itself (source and target text) as the present one is very difficult to read.

Thanks a lot,

Véronique