Text badly rendered when working with 2 displays

I’m using 2 monitors, one is MacBookPro Retina Display, the other is an ordinary non-hi-res Samsung, Mac OsX 10.8.5.
When I start LibreOffice, it acts as if there is no hi-res display and I see the text pixellated in Writer.
All is fine when I use only one display.
Is there a fix to this?

When you connect second monitor to MacBook, is that extra monitor connected to a VGA output? Could you play with a display settings on your operating system and see what happens?

My laptop has only one HD display – and that’s the one I can’t disconnect – but when I connect the other one, resolution of that extra monitor is very low (800x648) and that’s all what my laptop can handle. Settings on your operating system may give you some hints about that (graphic card(s), screen positions and such).

Your hardware and operating system (drivers) have more to do with monitors then LibreOffice (I think).

No, I tried this, I think it’s a matter of the application to always check if it’s on a high-res or non-hi-res screen, maybe this can be coded?