Is it possible to change the display font in Studio 2015 (not just the size, but the font itself)?

Hello,

I am quite new to to Studio 2015.

I have just installed it and I have tried to set up a few basic things, but I am not sure I am doing it correctly. I was wondering if someone can give me some advice.

1) I have tried to enlarge the size of the text in the Translation Results pane.
I go to File | Options | Editor | Translation Results Window and regardless of what I put in Font size, the text displayed is always the same. Why? I need to have it larger so I can see it.

2) I have tried to display the text in the translation source and target panes using a different font I prefer (PTSans for instance).

I go to File | Options | Editor | Font Adaptation
I select Adapt font size and choose minimum and maximum sizes and Adapt text colours (and so far so good).

But I want to use PTSans. So under Custom Language Font, I choose the source and the target languages (as an aside is there any way to just select a basic English instead of faffing about with a zillion variants?) and select PTSans.

But the text continues to be displayed in the same font as before. Why?

Thanks a lot

Lorenzo